List of Recurring Earth Characters in Stargate SG-1 - Other Recurring Earth Characters

Other Recurring Earth Characters

• Jacob Carter, played by Carmen Argenziano (seasons 2– 8) – A retired United States Air Force Major General and the widowed father of Samantha Carter and Mark. Jacob Carter is introduced in season 2's "Secrets" as a USAF general dying of cancer, and after becoming a willing host of a Tok'ra named Selmak who would cure his illness ("The Tok'ra") he frequently recurs as the Tok'ra liaison to Earth. As a member of the Tok'ra High Council, Jacob/Selmak engages in Tok'ra covert operations and 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 an invaluable weapon 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", but Selmak dies of old age one episode later in "Threads", taking Jacob with him.
• Adrian Conrad, played by Bill Marchant (seasons 5–6) – 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 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, played by Colin Cunningham (seasons 2–6, 8) – A United States Air Force Major stationed at the Pentagon. He is introduced in season 2's "A Matter of Time" and recurs in fifteen Stargate SG-1 episodes, usually aiding Stargate Command during conflicts with other nations on Earth and other portions of the United States government. He last appears in an alternate timeline in season 8's "Moebius", and makes a cameo appearance at the beginning of Stargate: Continuum. He also appeared in the Stargate Atlantis series finale, "Enemy at the Gate".
• Julia Donovan, played by Kendall Cross (seasons 6, 8–10) – A TV reporter who learns of the Prometheus program in season 6's "Prometheus" and intends to do a story on it. When she gets caught up in a rogue NID operation during her tour of the ship, she changes her mind in promised to be the first one to publish the story if and when the Stargate Program goes public. She helps cover up Stargate-related issues in season 8's "Covenant" and season 9's "Ex Deus Machina", and appears in an alternate universe in season 10's "The Road Not Taken".
• Henry Hayes, played by William Devane (season 7) – The President of the United States from season 7 onwards, introduced in season 7's "Inauguration". After Vice President Robert Kinsey and NID-agent Richard Woolsey inform him about the Stargate Program and several problems at Stargate Command, Hayes replaces General Hammond with civilian Dr. Elizabeth Weir as the new commander of Stargate Command in "Lost City". Hayes then appoints Hammond to command of the Prometheus during Anubis's actual invasion on Earth and forces Kinsey into resigning. After Anubis's defeat, Hayes puts 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 season 8's "Zero Hour", and he is mentioned again in season 10's "Bad Guys". President Hayes returns in an alternate timeline in Stargate: Continuum.
• Catherine Langford, played by Kelly Vint (girl in the film), Viveca Lindfors (elderly lady in the film), Elizabeth Hoffman (elderly lady in season 1), Nancy McClure (young woman in season 1) and Glynis Davies (middle-aged woman in season 2) – Daughter of archeologist Prof. Langford (first name never mentioned) who discovered the Stargate, as a girl she acquired an amulet depicting the Eye of Ra during the excavation of the Stargate in Giza in 1928. In present-day of Stargate, she gives the amulet to Daniel before his first mission through the Stargate to Abydos. 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 seen again in the series (although he is mentioned in season 1s "There But For the Grace of God" and season 2's "The Fifth Race"). Catherine Langford appears again in alternate universes and times in "There But For the Grace of God" and "1969". Her death is announced in season 8's "Moebius, Part 1"; she leaves her personal collection of documents and artifacts, including the golden medallion of Ra, to Daniel Jackson.
• Rodney McKay, played by David Hewlett (seasons 5–6, 8–10) – A brilliant scientist who works with Samantha Carter in "48 Hours", "Redemption" (two-parter), "Moebius" (two-parter), "The Pegasus Project", "The Road Not Taken". Rodney McKay went on to become a main character on the spinoff series, Stargate Atlantis.
• Robert Samuels, played by Robert Wisden (seasons 1–2, 8) – A USAF Lieutenant Colonel who re-introduces O'Neill to the Stargate Program in "Children of the Gods". He repeatedly raises his concerns over the SGC's and Hammond's incompetence in "Politics" and "The Serpent's Lair". Samuels last appears in an alternate universe in season 8's "Moebius (Part 1)".
• Pete Shanahan, played by David DeLuise (seasons 7–8) – A police detective working in Denver, Colorado. He meets 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.
• General Maurice Vidrine, played by Steven Williams (seasons 4, 7) A USAF General who oversaw the development and operations of Earth's fleet of spacecraft built using alien technology, including the X-301 and BC-303.