Jack O'Neill

Lieutenant General Jack O'Neill was the first leader of Former leader of::SG-1.

(1995)
An officer, Major Johnson comes to Jack O'Neill's house to see him and announce that he has been reactivated in the US Air Force.

Other Jack O'Neills

 * Jack O'Neills from alternate realities:
 * Brigadier General Jack O'Neill, commander of the SGA (SG1: ).
 * Jack O'Neill, Dr. Samantha Carter's husband, killed by an alternate Teal'c (SG1: ).
 * General Jack O'Neill, still commander of the SGC in an alternate reality (SG1: ).
 * Colonel Jack O'Neill, presumed still frozen in the Antarctic outpost after the battle of Antarctica in an alternate reality where the Stargate Program is public (SG1: ).
 * Jack O'Neills from alternate timelines:
 * Colonel Jack O'Neill, retired soon after an encounter with the Aschen.
 * Brigadier General Jack O'Neill, trapped and killed in Ancient Egypt in 3,000 BC after attempting to retrieve a Zero point module (SG1: ).
 * Colonel Jack O'Neill, a retired US military coming back to SGC in order to fix the timeline (SG1:, ).
 * Major General Jack O'Neill, killed by a Baal clone.
 * Colonel Jack O'Neill, a Special Forces operative.
 * Jack O'Neills from hallucinations:
 * Jack O'Neill, in Samantha Carter's hallucination (SG1: ).
 * Jack O'Neill, in Dr. Elizabeth Weir's hallucination (SGA: ).
 * Other Jack O'Neills:
 * Jack O'Neill, a duplicate of Jack O'Neill impersonated by a Unity (SG1: ).
 * Jack O'Neill, a robot version of Jack O'Neill created by Harlan (SG1:, ).
 * Jack O'Neill, a teenager clone version made by Loki (SG1: ).