Ba'al travels back in time and prevents the Stargate program from being started. SG-1 must somehow restore history.
Colonel Cameron Mitchell
Colonel Samantha Carter
Teal'c
Dr. Daniel Jackson
Vala Mal Doran
Major General Hank Landry
Major General Jack O'Neill
Ba'al
Lieutenant General George Hammond
President Henry Hayes
Camulus
Chief Mst Sgt. Walter Harriman
Apophis
Nirrti
Ra
Helmsman
