Ba'al travels back in time and prevents the Stargate program from being started. SG-1 must somehow restore history.
Movie tag line: "History may never repeat itself again."
Production companies:
Character: Colonel Cameron Mitchell
Character: Colonel Samantha Carter
Character: Teal'c
Character: Dr. Daniel Jackson
Character: Vala Mal Doran
Character: Major General Hank Landry
Character: Major General Jack O'Neill
Character: Ba'al
Character: Lieutenant General George Hammond
Character: President Henry Hayes
Character: Camulus
Character: Chief Mst Sgt. Walter Harriman
Character: Apophis
Character: Nirrti
Character: Ra
Character: Helmsman