Frank Simmons

A Colonel working with the N.I.D. at the Pentagon, Frank Simmons quickly made himself an enemy of the S.G.C., and revealed his connections to the unscrupulous rogue arm of the agency. On the surface, Colonel Simmons came across as a typical government bureaucrat. He led the study of a powerful alien weapon that SG Team|SG-1]] discovered on an alien world, nearly bringing deadly retribution from the Ancients. He also attempted to capture an alien who had taken human form, and who had become enamoured with Major Carter. He conducted an investigation of General Hammond and SG-1, submitting a very unfavorable report questioning the team's loyalties and recommending Hammond's dismissal.

Simmons is a leader at the N.I.D., a civilian organization in the U.S. government, based in Washington, D.C. and assigned to study alien technology and lifeforms that Stargate teams bring back to Earth. He was recruited by Colonel Harold Maybourne. A secret, rogue arm of the N.I.D. operates unscrupulously outside the law, and (after Maybourne's departure) Simmons was for a time at the center of it.

When a wealthy businessman named Adrian Conrad had himself implanted with a Goa'uld symbiote to save his life, Colonel Simmons secretly took him into custody. He used the Goa'uld for its secrets, and eventually hijacked Earth's first interstellar space vessel, Prometheus. While travelling through space, the Goa'uld turned on Simmons and attacked him; Simmons shot and killed the host body, but the Goa'uld took him over. He engaged Teal'c and Jack O'Neill in hand-to-hand combat, and nearly killed the Jaffa before O'Neill sent him out an airlock to his death.