A wealthy business-owner determined to beat a rare, incurable illness by any means necessary. Conrad orchestrated the capture of Samantha Carter after learning that she had once been the host to a Goa'uld symbiote. Determined to learn the creatures' regenerative secrets in order to save his own life, Conrad was all-too prepared to sacrifice her life for medical research to benefit himself.
The Russians had captured a Jaffa during their short-lived Stargate program, which was procured for Conrad by Harold Maybourne. The symbiote was believed to be one of Cronus' offspring, and Conrad's corporation purchased the creature to study it. Conrad believed that once the creature was within him, it could be removed after he was healed, and decided to go through the procedure after his illness reached its apex.
The Goa'uld was successfully implanted -- and Conrad himself was never heard from again. The creature immediately demanded passage off the planet, but was intercepted by Colonel Simmons, who transferred him to an N.I.D. safe-house in North Dakota. It was later uncovered by Colonel O'Neill and Maybourne, who transferred the Goa'uld-possessed Conrad into the custody of the federal government.
Conrad died when his symbiote attempted to escape with the hijacked Prometheus, trying to commandeer the ship from Colonel Simmons and his rogue N.I.D. team while in hyperspace. Simmons, however, shot him at point blank range, and the Goa'uld transferred into him instead, killing Conrad for good. The symbiote was killed soon after, when O'Neill spaced him.
Conrad's medical file listed his date of birth as February 6, 1966.
Desperate Measures - Eager to relieve himself of a terminal illness, Adrian Conrad is willing to kill Samantha Carter to learn the regenerative secrets of her previous experience with a symbiote, but is possessed by a Goa'uld and drowned out by host suppression forever.
48 Hours - The Goa'uld within Adrian Conrad reveals important secrets of the D.H.D. to Colonel Simmons, eager to exchange information for freedom from prison.
Prometheus - Rogue N.I.D. agents demand the release of Colonel Simmons and Adrian Conrad from prison, turning over the Prometheus and escaping from Earth. Conrad is shot point-blank in the chest by Simmons, who then receives the symbiote.