List of Earth characters in Stargate SG-1

This is a list of characters from Earth in the science fiction television show "Stargate SG-1".

Main characters from Earth

* Jack O'Neill (played by Kurt Russell in the film and Richard Dean Anderson in the series). A United States Air Force officer who, ranked Colonel, leads the original mission through the Stargate to Abydos in the film after his son shot himself with Jack's handgun. He is leader of the SG-1 team from season 1 to early season 8 in "Stargate SG-1". After his promotion to Brigadier General in season 8's "New Order", he takes charge of Stargate Command. Promoted again to Major General before season 9's "Avalon", he is reassigned to Washington as Head of Homeworld Security.
* Samantha Carter (played by Amanda Tapping). A scientist as well as a USAF officer who becomes O'Neill's second-in-command of the SG-1 team in the pilot episode of "Stargate SG-1". Initally holding the rank of Captain, she is promoted to Major in season 3, to Lieutenant Colonel in season 8 and to (full-bird) Colonel after season 10. She becomes leader of Atlantis Expedition in season 4 of "Stargate Atlantis".
*Daniel Jackson (played by James Spader in the film and Michael Shanks in the series). A brilliant Egyptologist who in the film is shunned by the academic world due to his farfetched theories, but finds out they are true when he joins the Stargate project. He is part of the original mission through the Stargate and is member of SG-1 since the start. Daniel ascends to a higher form of existence in season 5 but is returned by the other ascended beings after attempting to battle Anubis.
*George Hammond (played by Don S. Davis). A USAF Major General (later Lieutenant General) who replaces Major General West as commander of Stargate Command before the series. He leaves the SGC and becomes Head of Homeworld Security after season 7.
*Cameron Mitchell (played by Ben Browder). A USAF Lieutenant Colonel who becomes leader of SG-1 in season 9.
*Hank Landry (played by Beau Bridges). The commander of the SGC beginning season 9.

Recurring SGC characters

Janet Fraiser

Dr. Janet Fraiser, played by Teryl Rothery, is Chief Medical Officer of the SGC under Major General Hammond in seasons 1 through 7, first seen in "The Broca Divide". She is responsible for maintaining the health of the SG teams, as well as the SGC's support staff and base personnel. On many occasions, she also cares for the health of alien refugees to Earth, including Goa'uld symbiotes. In her first appearance in "The Broca Divide", Dr. Fraiser holds the rank of Captain, and is promoted to Major during Season 3.episode|date=July 2008 Dr. Fraiser mentions having been married before she came to the SGC. ["Hathor" (Stargate SG-1)] In season 1's "Singularity", Fraiser adopts Cassandra, an alien orphan whose people had been exterminated by the Goa'uld System Lord Nirrti. The relationship is revisited in season 5's "Rite of Passage".

When a film crew comes to document the SGC in season 7's "Heroes", Dr. Fraiser is interviewed for a documentary celebrating the 1000th trip through the Stargate. During a shared meal with the documentarian, Fraiser is called away to a medical emergency to treat Senior Airman Simon Wells for a staff blast wound. Fraiser is shot by a Jaffa and is killed instantly. Dr. Jackson, who had been filming a message for Airman Wells' wife, caught the incident on camera. Her loss greatly affected all SGC personnel, and was noted to the very top of the U.S. Administration as a tragic loss. Airman Wells survives and names his daughter "Janet" in honor of Dr. Fraiser.

Despite her death, Dr. Fraiser appears in an alternate timeline in the future, and as a character from an alternate reality. In the episode "2010" of an alternate timeline, an alien human race named the Aschen have sterilized the entire population to eventually have uncontested control of the planet, but Fraiser and SG-1 are eventually able to alter the timeline to prevent the Aschen from gaining a foothold on Earth. Fraiser also returns in season 9's "Ripple Effect" as a parallel universe version of Dr. Fraiser that appears when several SG-1 teams from alternate realities are pulled together; in her reality, she survived the mission and joined SG-1 as a regular member. Before Fraiser returns to her reality, Carter, Jackson and Teal'c are able to give her a final goodbye.

Walter Harriman

Walter Harriman, played by Gary Jones, is primarily a Stargate technician, running the dialing computer and other equipment from the Control Room. He occasionally acts as an administrative assistant to the head of Stargate Command, and has manned the flight console on the bridge of the "Prometheus". He is one of four characters to appear in both the pilot and final episode of "Stargate SG-1", the others being Daniel Jackson, Samantha Carter and Teal'c. He has risen to the rank of Chief Master Sergeant in "Avalon Part 1".

The character's name has been a common source of confusion, as the show credits originally listed him as simply "Technician" or "Sergeant". His name tag later says "Norman Davis", but his name was never used in dialogue. After O'Neill had referred to him as "Walter" in the season 4 episode "2010", producer/director Peter DeLuise refers to the character as "Walter Norman" and "Walter Norman Davis" on several DVD commentaries, but the producers could not get clearance for a renaming into "Walter Davis". The new name of "Walter Harriman" is based on General Hammond referring to Jones's character as "Airman" (sounding like "Harriman") in the pilot episode, [cite video |people= |date2= |month2= |year2=2007 |title=Stargate SG-1 Season 10 DVD featurette – "Life as a Tech with Gary Jones" |url= |format= |medium= DVD |publisher=MGM] and "SG-1" writer Joseph Mallozzi explained the resulting incongruity as a married-name issue. [cite web |url=http://www.gateworld.net/sg1/s8/making/804.shtml |last=Mallozzi |first=Joseph |authorlink=Joseph Mallozzi |title=In the Making: Zero Hour |publisher=gateworld.net |accessdate=2007-10-18] He is known as "Chevron guy" among fans. As of Stargate Continuum, Walter has finally received his own parking spot, "after 10 years and 10,000 emails."

He may also be a slight homage to Walter 'Radar' O'Reilly of M*A*S*H fame. When Jack O'Neil became a General and assumed command of the SGC Walter showed an ability to both predict what Jack would need before he needed it as well as finish his sentences or answer questions before he finished them. All these are traits Radar was famous for on M*A*S*H.

Charles Kawalsky

Charles Kawalsky, played by John Diehl (Lieutenant Colonel Kawalski) in the film and Jay Acovone (Captain and Major Kawalski) in the series, participates on the first mission to Abydos in the film as O'Neill's second-in-command. After his safe return home, Kawalksy and his teammates decide to keep silent about the real events of the mission. In the pilot episode of "Stargate SG-1", Kawalsky accompanies O'Neill to Abydos again and is later assigned to lead the newly formed SG-2 team. In their mission to Chulak with SG-1, Kawalsky is infected with a young Goa'uld who begins to take control over Kawalsky back on Earth. Kawalsky dies in the next episode, "The Enemy Within", with his head held into the event horizon when the gate closes. Kawalksy remains a recurring character, whom SG-1 encounters in alternate and virtual reality versions in the episodes "The Gamekeeper" (season 2), "Point of View" (season 3) and in "Moebius (Part 2)" (season 8).

Carolyn Lam

Dr. Carolyn Lam, played by Lexa Doig, is Stargate Command's chief medical officer in seasons 9 and 10. She first appears in "Avalon Part 2" and is seemingly the first permanent one since the death of Dr. Janet Fraiser in season 7. Prior to joining Stargate Command, Dr. Lam worked with the Centers for Disease Control and Prevention; her specialty is infectious diseases. Dr. Lam has a strained relationship with her father, Major General Hank Landry. In "The Fourth Horseman", General Landry apologizes for not having been with her when she needed him as a child. Carolyn, her father and her mother Kim Lam, have dinner in the episode "Family Ties".

Bill Lee

Dr. Bill Lee, played by Bill Dow, is a civilian scientist and engineer who works at Stargate Command and is often called upon to work with alien technology. He first appear in "Prodigy" but does not step in the foreground until "Evolution" where he and Daniel Jackson go on a mission to Honduras to locate the Ancients' healing device but are captured and tortured by local terrorists. As seen in "Heroes", Dr. Lee is responsible for creating a staff weapon-resistant armor. He is also a recurring character on "Stargate Atlantis". He devises a way to relay a warning to Atlantis in "Critical Mass" and gates to the Pegasus Galaxy from the Midway Station in "Adrift " when Atlantis goes missing. Dr. Lee remains stationed at Midway, training Kavanagh as his replacement, until the midway station is destroyed in "Midway". Dr Lee is also the father of more than one child, as seen in "Critical Mass".

iler

Master Sergeant Siler, played by Dan Shea, is one of Stargate Command's primary technicians and engineers. Siler is also the maintenance engineer for the Alpha Site and occasionally appears in Earth-based episodes of "Stargate Atlantis", such as "Rising". Siler's full name is never mentioned in dialogue in the series, but his first name is given on his uniform patch and in magazines as "Sly" several times, [""] and at least once as "Dan" in "Entity". Making his first appearance in season 1's "Solitudes", Siler is responsible for seeking out the location of enemy radar installations, jamming radar and launching counter attacks. He is sometimes seen engaging in technobabble with Samantha Carter, who has mentioned at least once that they were working on motorcycle repairs together.episode|date=August 2008

Dan Shea is primarily the stunt co-ordinator for "Stargate SG-1", responsible for the budgets and locations of stunts, and the hiring stunt people before co-ordinating all stunt action.Cite journal |last=Eramo |first=Steven | title=Dan Dare – Stunt man |newspaper=TV Zone |issue=Special 46 |pages=28–29 |date=July 2002 |year=2002] He is also a stunt double for Richard Dean Anderson, reprising his role from the "MacGyver" TV series. His character is consequently involved in many accidents at the SGC, which is parodied in several "SG-1" episodes. Daniel Jackson accidently knocks down Siler in each instance of a time loop in season 4's "Window of Opportunity". In season 7's "Heroes", Siler is used as the crash test dummy for the new armour designed to defend against energy weapons, and Dr. Bill Lee assures the present documentary TV crew that Siler does this all the time. When an exploding power conduit throws Siler across the room in the milestone episode "200", Siler asks himself why this always happens to him. According to producer Peter DeLuise, the few lines of Siler's dialog deliberately contain the letter "S" because Dan Shea lisps.cite video |people=DeLuise, Peter |year2=2004 |title=Audio commentary for "Death Knell" |medium= DVD |publisher=MGM] Siler also frequently appears in the background of scenes carrying an oversized wrench, which he sometimes hands to director Martin Wood as a gag prop in the series.

Minor military characters

* Major General West, played by Leon Rippy in the film, heads the USAF's Project Giza, the forerunner of Stargate Command in the film. As such, he oversees Dr. Catherine Langford's experiments with the Stargate and immediately militarizes the program and authorizes the initial excursion to Abydos after Daniel Jackson discovers the functionality of the Stargate. The novel based on the film describes him as a "stern soldier about fifty years old", who was "respected and feared by all who served under him". ["Stargate: A Novel by Dean Devlin & Roland Emmerich" (1994), page 56] He does not appear in "Stargate SG-1" but is mentioned in the pilot episode, and subsequent episodes in the first two seasons.
* Louis Ferretti (played by French Stewart in the film and Brent Stait in the series) A member of the United States Air Force and one of the four survivors of the first expedition through the Stargate in "Stargate". Ferretti joins O'Neill's team on another mission to Abydos in "Children of the Gods", and is put in charge of SG-2 some time after the death of Charles Kawalsky in "The Enemy Within". Ferretti makes his last appearance in "Within the Serpent's Grasp" to follow SG-1 through the Stargate, and is mentioned in season 3's "Shades of Grey" as a possible new leader of SG-1.
* Colonel Robert F. Makepeace, played by Steve Makaj, is a long-time commander of Stargate Command's SG-3 Marine unit. He is introduced in season 1's "The Broca Divide". In season 3's "Shades of Grey", Makepeace is discovered to be a spy for the rogue N.I.D. group under the command of Colonel Harold Maybourne, who is covertly reverse-engineering stolen alien technologies. Smaller items stolen by the rogue group would be left on a designated world for Makepeace to covertly pick up and pack back to Earth in his gear during routine missions. O'Neill had Makepeace arrested and charged with high treason against the United States and its allies.
* Colonel Reynolds, played by Eric Breker, is introduced in "Touchstone" as a Major stationed at Area 51. He is promoted to Lieutenant Colonel and assigned to Stargate Command to lead SG-16. He is later promoted to Colonel and becomes the leader of SG-3, a Marine unit who often provide back-up for SG-1.
* Technician (played by Laara Sadiq)
* Technician Vern Alberts (played by Bill Nikolai)
* Major Pierce (played by Rob Lee)
* Lieutenant Graham Simmons (played by Tobias Mehler)
* Major Griff (played by Russell Ferrier)
* Lieutenant Elliot (played by Courtenay J. Stevens)
* Jennifer Hailey (played by Elisabeth Rosen), an Air Force Cadet in "Prodigy" and "Proving Ground"
* Dr. McKenzie (played by Eric Schneider)

Minor civilian characters

* Jay Felger (played by Patrick McKenna) A scientist who works alongside SG-1 in "The Other Guys" and "Avenger 2.0". He is fascinated with SG-1 and has romantic fantasies about Samantha Carter.
* Dr. Robert Rothman (played by Jason Schombing). Prior to joining the SGC, he was Daniel Jackson's research assistant. He first appears in season 3's "Forever In A Day" in a Hand device-induced delusion of Daniel Jackson, where he is placed on SG-1. His first non-fantasy appearance is in "Crystal Skull", where Rothman is tasked with researching a crystal skull. Rothman becomes a host to a Goa'uld larva and during a rescue mission on an offworld archaeological dig site in "The First Ones" and is shot dead by Colonel Jack O'Neill.
* Dr. Warner (played by Kevin McNulty)
* Dr. Brightman (played by Alisen Down)

Recurring NID/Trust/IOA characters

Malcolm Barrett

Malcom Barrett, played by Peter Flemming, is an NID agent who, in spite of the NID's traditional image of being a dark, shadowy and oily agency, is an example of the N.I.D.'s upright and legal operations. Barrett first appears in "Wormhole X-Treme" in season 5 of "Stargate SG-1". His first significant appearance follows in "Smoke & Mirrors", where he helps uncovering a shadow group behind the NID who tried to attribute Senator Kinsey's apparent assassination to Jack O'Neill. Barrett briefly appears in "Heroes, Part 2" to inform Carter about Richard Woolsey's strong dislike for secret military operations such as the SGC. Barret assists Carter and Dr. Daniel Jackson in "Resurrection" and "Ex Deus Machina". Barrett has a personal interest in Samantha Carter, but she rejects his advances in "Uninvited". In the same episode, Barrett inadvertently assists Ba'al and his clones in escaping from the SGC, due to brainwashing by operatives of the Trust. He is mentioned in the following episode, "Insiders", when, having defeated the brainwashing, he heads up an investigation into a stolen Sodan Cloak.

Agent Barrett also appears at several points in "Stargate Atlantis". He warns General Landry in "Critical Mass" of the The Trust's plan to destroy Atlantis with a bomb. He is also seen liasing with Expedition team members while they work on Earth, such as tracking down Jeannie Miller when she is kidnapped.episode|date=July 2008

Robert Kinsey

Robert Kinsey, played by Ronny Cox, is introduced in the season 1 clip show "Politics" as (according to Cox) a "self-aggrandizing senator who like [s] to throw his weight around".Cite journal | last=Eramo | first=Steven | author-link= | title=Stargate SG-1 – Ronny Cox – Politically Incorrect | journal=TV Zone | issue=Special #55 | pages=64 | year=2004 | date=February 2004 | url=] As "Kinsey feels that the Stargate being used in completely the wrong way and one that is endangering American ideals and a way of life that he believes in", Cox played him a heroic antagonist rather than villainous. Cox was approached by the producers to play Kinsey instead of auditioning himself. Kinsey holds the position of chairman of the Senate Appropriations Committee until season 7 and oversees the national defence budget of secret projects such as the Stargate Program. The character proved so popular that many freelance writers included the character in their scripts.

In "Politics", Kinsey ignores warnings of an imminent Goa'uld invasion and instead manages to briefly shut down Stargate Command for budget reasons. In season 4's "Chain Reaction", Kinsey and the NID temporarily succeed in controlling the Stargate by blackmailing General Hammond into retirement. In season 5's "2001", Kinsey aims to gain prestige through an alliance with the Aschen, but the alliance fails. (However, the alliance went ahead in the alternate but unfulfilled future reality witnessed in season 4's "2010", in which Kinsey also achieved his goal of the presidency.)

In season 6's "Smoke and Mirrors", a group controlling the rogue NID, known as "the Committee", tries to assassinate Kinsey and frame Col. O'Neill for his murder, but NID agent Malcolm Barret and SG-1 foil this attempt. Kinsey becomes Vice-President in season 7's "Inauguration" and tries again to take control of the Stargate Program in "Lost City". Shortly after NID Agent Richard Woolsey presents incriminating evidence against Kinsey to President Henry Hayes in the same episode, Hayes "accepts" Kinsey's resignation. Kinsey makes his last appearance in season 8's "Full Alert", where the SGC convinces Kinsey to go undercover to undermine the hierarchy of the Trust. However, the Goa'uld have completely infiltrate the Trust through their operatives working outside of the solar system, and have already implanted a symbiote within Kinsey to aid in their plans of starting a nuclear war between the US and Russia. After the SGC foil the attempt, Kinsey flees aboard an Al'kesh, but Kinsey's future remains uncertain as the Al'Kesh is destroyed while he operated a transport device.

Harry Maybourne

Colonel Harry Maybourne, played by Tom McBeath, is introduced in season 1's "Enigma" as an NID member with ambiguous morals and loyalties who attempts to gain advanced Tollan technology. In season 2's "Bane", the now-Colonel Maybourne leads an NID attempt to claim Teal'c for study when Teal'c had been infected by an alien insect. The following year, in "Foothold", Maybourne helps Major Carter thwart the plan of an alien species to take over Stargate Command. Maybourne leads several rogue NID operations to acquire alien technologies in a more ruthless manner than the SGC, but when his activities are thwarted, Maybourne flees to Russia and aids in establishing the Russian Stargate Program. He is caught in season 4's Watergate", convicted of treason, and placed on death row. O'Neill contacts Maybourne in "Chain Reaction" to aid reinstate General Hammond after he was blackmailed into resigning from his position. Maybourne escapes after the mission's success, but he covertly helps O'Neill again in season 5's "Desperate Measures" and "48 Hours" in the Adrian Conrad case. In season 6's "Paradise Lost", Maybourne tricks SG-1 into taking him off-world, but he and O'Neill get trapped. The Tok'ra eventually rescue them, and exile Maybourne to a far-off planet. SG-1 are sent to recover him in season 8's "It's Good To Be King" to prevent him from falling into the hands of the Goa'uld System Lord Ares, but they find him leading a life of leisure as the ruler of the local peoples, King Arkhan I. He has gained knowledge of the planet's near-future and poses as a prophet, but the people later choose to overlook this deception as his technological expertise improved their standard of life. When SG-1 return to Earth, Maybourne remains with the people that he had grown to love.

Frank Simmons

Colonel Simmons, played by John de Lancie, becomes the NID liaison to Stargate Command after Col. Harry Maybourne's arrest for treason. Simmons is introduced in season 5's "Ascension" and is notorious for claiming to have the best interest of the nation at heart, while really he has his own political agenda. In "Desperate Measures", Simmons shoots Col. Jack O'Neill in the back while O'Neill was attempting to capture a Goa'uld who has taken Adrian Conrad as host. "48 Hours" reveals that Simmons' involvement in the disappearance of the Adrian Conrad Goa'uld, whom he now holds captive, and General George Hammond has Simmons arrested. In season 6's "Prometheus", rogue NID agents hijack the unfinished starship "Prometheus" and demand that Simmons, along with Adrian Conrad's Goa'uld, are released. It later turns out that Simmons had orchestrated the entire affair. When Conrad is killed, the Goa'uld infects Simmons. O'Neill is able to open an emergency outer door and releases Simmons into the vacuum of space, effectively killing him.

Richard Woolsey

Played by former ' actor Robert Picardo, Richard Woolsey"' is introduced in season 7's "Heroes" as a member of the NID who examines the command decisions at Stargate Command after the death of Dr. Janet Fraiser. Picardo described Woolsey as a "hard guy", a "conflict character" and the "ultimate bureaucrat". Woolsey appears antagonistic because of his weaker social skills although he often has protagonist agendas. The role in "Heroes" was originally a one-day guest role. Picardo was then brought back for the follow-up episode "Inauguration", which began the rehabilitation of the Woolsey character.cite web |url=http://www.gateworld.net/interviews/brave_new_woolsey.shtml |title=Brave New Woolsey – GateWorld talks with Robert Picardo |publisher="GateWorld" |daet=July 2008 |accessdate=2008-08-10] In this episode, Woolsey comes to realize Senator Kinsey's ambitions and presents incriminating evidence against him, indirectly forcing Kinsey into resigning. Woolsey returns in the season 9 episode "Prototype", where his encouragement of great risks cause injury and death among SGC personnel; Woolsey acknowledges his own error and pleads for forgiveness from the SG-1 team. With the story introduction of the IOA, the Woolsey character makes more regular appearances to "annoy people" and has more humor. Woolsey and some of his IOA collegues are rescued by SG-1 and the crew of the "Odyssey" after a catastrophe on the Gamma Site in "The Scourge", which Woolsey considers an "eye-opening experience". Woolsey makes two more appearances in "Flesh and Blood" and "Morpheus" and last appears on "SG-1" in season 10's "The Shroud", which shows how Woolsey "was not quite so confident and on his game as he was in the conference room". The character also recurs in seasons 3 and 4 of "Stargate Atlantis" before becoming a main character there in season 5.

Earth ship crew characters

Paul Emerson

Colonel Paul Emerson, played by Matthew Glave, is introduced as the commander of the "Odyssey" in season 9's "Off the Grid", rescuing SG-1 and aiding in their mission to take back all stolen Stargates from Ba'al's ship. In the next episode, "The Scourge", he again rescues SG-1 and a team of the IOA from the Gamma Site. In the season 9 finale, "Camelot", Emerson teams up the "Odyssey" with many other ships of the Jaffa, the Asgard and the Lucian Alliance to battle the Ori battlecruisers which come through an open Supergate, and the "Odyssey" takes much damage. Emerson continues serving as the commander of the Odyssey in season 10 but is killed by a member of the Lucian Alliance in "Company of Thieves".

Lionel Pendergast

Colonel Lionel Pendergast, played by Barclay Hope, replaces Colonel William Ronson as commander of the "Prometheus" and is first seen in "New Order Part 2" patrolling Earth. Pendergast intercepts Thor's Asgard mothership "Daniel Jackson" after its arrival in Earth's solar system and destroys a Trust-controlled Al'kesh in "Full Alert". He is leading the search of Osiris's cloaked Al'kesh in Earth's orbit in "Endgame" and transports the Stargate and SG-1 aboard before the enemy vessel enters hyperspace. In season 9's "Beachhead", Pendergast delivers a Mark IX warhead to an Ori beachhead and maintains the ship's position during the mission despite Jaffa and Ori interruption. Pendergast dies during the destruction of the "Prometheus" by an Ori satellite weapon in "Ethon"; he remained aboard to beam his crew off the ship, thus saving 76 lives.

Kevin Marks

Kevin [http://josephmallozzi.files.wordpress.com/2008/02/dsc04709.jpg.] Marks, played by Martin Christopher, is a USAF officer aboard the "Prometheus" introduced in "Avalon Part 1", helping Lt. Colonel Mitchell and SG-1 locate and gain access to the Ancient stronghold at Avalon. Marks is also present during the Kalana mission in "Beachhead" and the subsequent search for Gerak's hidden mothership in orbit of Earth's moon in "Ex Deus Machina", after which he is promoted to Captain. Following the destruction of the "Prometheus" in "Ethon", Marks is promoted to Major and becomes a Bridge officer onboard the "Odyssey", where he participates in various operations in "Camelot", "The Scourge, "Flesh and Blood", "Talion", and "Unending". Marks' last apparent "SG-1" mission onboard the "Odyssey" is the retrieval of the Ark of Truth from the Ori Home Galaxy in "". He takes a similar bridge position onboard the "Apollo" in "Atlantis"'s "Be All My Sins Remember'd" and transfers to "Daedalus" in "Search and Rescue".

Minor characters

* Colonel Davidson (played by Fulvio Cecere) Commander of the "Odyssey" as of season 10's "Family Ties". He is briefly relieved of his command by General Landry during "Unending", and by Colonel Mitchell during the events of "The Ark of Truth".
* Colonel Kirkland (played by Kurt Max Runte) Commander of the "Prometheus" after Colonel William Ronson and before Colonel Lionel Pendergast, only seen in "Lost City".
* Colonel William Ronson' (played by John Novak) Commander of the "Prometheus" during seasons 6 and 7.
* Lieutenant Womack (played by Chelah Horsdal) One of the survivors of "Prometheus" after its destruction in "Ethon".
* Catherine Ambrose (played by Chelah Horsdal) A US Airforce officer of unknown rank. She takes over from Major Erin Gant as the helmsman of the "Prometheus" in season 8's in "New Order, Part 2" and is last seen in "Full Alert".
* Major Erin Gant (played by Ingrid Kavelaars) A US airforce Major and the first known helmsman of the "Prometheus" under Colonels Ronson and Kirkland as well as General George Hammond. She is first seen in "Memento" and last seen in "Lost City".

Other recurring characters

Jacob Carter

Carmen Argenziano played Major General Jacob Carter (Ret.), the widowed father of Samantha Carter and Mark. Jacob Carter is introduced in season 2's "Secrets", which the producers originally intended as the first and last episode to feature the character before he dies of cancer. In the episode "The Tok'ra", however, a Tok'ra named Selmak is introduced who cures Jacob's illness after Jacob agrees to become host to him, turning him into the official Tok'ra liaison to Earth.Cite journal | last=Eramo | first=Steven | author-link= | title=SG-1 – Carmen Argenziano – Get Carmen | journal=TV Zone | issue=Special #46 | pages=20–21 | year=2002 | date=July 2002 | url=] As a member of the Tok'ra High Council, Jacob/Selmak engages in Tok'ra covert operations and also provides help to Stargate Command when problems arise. He goes on off-world missions with SG-1, and frequently provides valuable knowledge and expertise, including the ability to use a Goa'uld healing device. When the Earth-Tok'ra relations deteriorate, Jacob/Selmak remains the strongest link between the allies despite his loss of influence in the Tok'ra High Council. In season 7's "Death Knell", Jacob helps his daughter devise the Kull Disruptor as invaluable in fighting the army of Kull Warriors of Anubis's creation. He also plays a key role in retuning the Dakara Superweapon to the right pattern to attack the Replicators in season 8's "Reckoning". When Selmak dies of old age in season 8's "Threads", Jacob dies as well.

Chekov

Colonel Chekov, played by Garry Chalk, is assigned as Russia's liaison to Stargate Command following the early season 4 events of the short-lived Russian Stargate program. He first appears in season 5's "The Tomb", where he blames SG-1 for the death of several Russian team members who joined SG-1 on a mission. Chekov collaborates with the SGC several episodes later in "48 Hours" to free Teal'c from the trapped Stargate, giving them a DHD from Russian possession, and allowing the SGC to use the Russian Stargate to bring the current offworld teams home. Colonel Chekov is appointed to be the Russian envoy to the SGC around season 6's "Redemption" and agrees to give the Russian Stargate to the US in exchange for money, X-302 technology, and a Russian SG team. When the US discloses the existence of the Stargate to other countries in the same season's "Disclosure", Colonel Chekov accompanies General Hammond and Major Paul Davis in the presentation of the program to French, British and Chinese ambassadors, and convinces the ambassadors to permit the US to retain control over the Stargate. In season 8's "Full Alert", Colonel Chekov informs Brigadier General Jack O'Neill of the possible Goa'uld compromise of the US government. After the Russians blackmail the American government into giving them a Daedalus class battlecruiser in season 9's "Crusade", Chekov is put in command of the "Korolev" to stop the Ori fleet from invading the Milky Way in "Camelot". It is unknown whether Chekov is among the six crewmembers to have escaped from the ship before its destruction, as he is never seen or mentioned afterwards.

Adrian Conrad

Adrian Conrad, played by Bill Marchant, is a wealthy business man suffering from an incurable terminal illness and desperate to uncover the regenerative biological secrets of Goa'uld symbiotes. He hopes to learn the effects a blending had on a human by abducting Major Samantha Carter in "Desperate Measures", but her resistance forces him to be blended with the symbiote himself. Conrad, incarcerated under the control of Frank Simmons of the NID, unknowingly assists in freeing Teal'c from the inner workings of the Stargate in "48 Hours". Rogue NID agents are eventually able to release Conrad and Simmons from custody and escape with them aboard the hijacked and unfinished starship "Prometheus". The Goa'uld desires to gain control of the "Prometheus" and finds its way into Col. Simmons after Simmons killed Conrad. O'Neill releases the infected Simmons into the vacuum of space through an airlock during a fight.

Paul Davis

Major Paul Davis, played by Colin Cunningham, is stationed at the Pentagon and often helps Stargate Command when they come in conflict with other nations on Earth and other portions of the United States government. Major Davis first appears in season 2's "A Matter of Time" and serves as the president's messenger in season 3's "Into the Fire". In "Foothold", Davis is one of people at the SGC who is captured and impersonated by an unknown alien race. When SG-1 tries to stop the Replicators from becoming a threat to Earth in "Nemesis" and "Small Victories", Major Davis oversees their attempts. Major Davis later helps SGC to rescue Colonel Jack O'Neill and Teal'c in "Tangent" after they are captured in the X-301. He also assists Daniel Jackson in negotiations with the Russians for their DHD in "48 Hours".

Davis joins SG-1 on a mission in season 6's "Descent" to investigate a Goa'uld mothership that suddenly appeared in Earth orbit. In "Prometheus", he assists SG-1 to stop a reporter from exposing the new "Prometheus" project. He works together with General Hammond in presenting the Stargate Program to representatives of the UN Security Council in "Disclosure". In an alternate timeline shown in season 8's "Moebius", a moustached Major Davis recruits the alternate versions of Daniel Jackson and Samantha Carter for a mission to Ancient Egypt to restore the original timeline. As claimed by Lt. Col. Cameron Mitchell in "Avalon (Part 1)", Major Davis helps the Jaffa set up a new government based on democratic ideals. Major Davis makes a cameo appearance in "" during the opening credits of the moving.

Henry Hayes

Henry Hayes, played by William Devane, is introduced in season 7's "Inauguration", on his his first day as President of the United States. Learning about the Stargate program, Hayes is also informed about several problems at Stargate Command by Vice President Robert Kinsey and NID-agent Richard Woolsey, although Woolsey later delivers incriminating information about Kinsey, throwing even his legitimate complaints into a new light.

In "Lost City", Hayes nevertheless removes General Hammond from command and selects the civilian Dr. Elizabeth Weir as his successor. He instead appoints Hammond to command of the Prometheus during Anubis's actual invasion on Earth and forces Kinsey into resigning.

After Anubis' defeated, Hayes puts Jack O'Neill in command of the SGC and selects Dr. Elizabeth Weir as the leader of the Atlantis expedition. His first official visit to the SGC is alluded to in "Zero Hour", and is mentioned in "Bad Guys" where Lieutenant Colonel Samantha Carter briefs him and other members of The Pentagon on the consequences of revealing the Stargate Program to the public as she experienced in the alternate reality in "The Road Not Taken".

An alternate President Hayes returns in "". As the President in the new timeline he prevents SG-1 from ever traveling through the Stargate again in fear that they'll erase the timeline if they are allowed to. Things change when Ba'al's fleet arrives and he talks to Ba'al himself before Qetesh interrupts. He manages to learn from the Russian President that the Russians found the other Stargate and passes the message onto SG-1. He is last seen in the alternate timeline in a collapsing command bunker.

Catherine Langford

Catherine Langford was present during the excavation of the Stargate in Giza in 1928 in "Stargate", where she acquired an amulet depicting the Eye of Ra that she eventually gives the amulet to Daniel Jackson before he first goes through the Stargate to Abydos. Catherine Langford was played by Kelly Vint (girl) and Viveca Lindfors (elderly lady) in the film, and by Elizabeth Hoffman (elderly lady), Nancy McClure (girl) and Glynis Davies (middle-aged woman) in "Stargate SG-1", where she also appears in alternate universes and times in "There But For the Grace of God" and "1969". Her fiancé, a scientist named Ernest Littlefield (played by Keene Curtis and Paul McGillion) is the first human to have travelled through the Stargate since the Ancient Egyptians buried it. Catherine and Ernest were separated by a gate incident in 1945 and were re-united in the mid-season 1 episode "The Torment of Tantalus", but Ernest is never mentioned or seen again in the series. Catherine Langford's death is announced in the eighth-season episode "Moebius, Part 1". She leaves her personal collection of documents and artifacts – including the golden medallion of Ra – to Daniel Jackson.

Pete Shanahan

Pete Shanahan, played by David DeLuise, is a police detective working in Denver, Colorado. He meets Samantha Carter and develops a romantic relationship with her in the late-season-7 episode "Chimera" after Carter's brother set them up. He is divorced since his previous wife could not quite cope with his work. Curious about Carter's work, he finds out about Carter's involvement with a top-secret project through an FBI acquaintance. After witnessing a fight between SG-1 and Osiris, he is given security clearance and learns the true nature of the Stargate program. Carter and Shanahan continue to see each other throughout season 7 and 8 until Shanahan proposes to marry Carter in "Affinity". She agrees, but she cancels the wedding and breaks up with him in "Threads" after he had already made wedding arrangements and was ready to buy a house.

Minor characters

* Lt. Col. Robert Samuels (played by Robert Wisden)
* Julia Donovan (played by Kendall Cross), TV reporter
* General Vidrine (played by Steven Williams)
* Brigadier General Kerrigan (played by Michael Kopsa)
* Joseph Faxon (played by Christopher Cousins) An ambassador and husband of Samantha Carter in an alternate timeline, appears in "2010" and "2001".

ee also

*List of Earth characters in Stargate Atlantis

References