Stargate: Continuum

Stargate Continuum is a 2008 CanadianAmerican military science fiction directtovideo film in the Stargate franchise. It is the second sequel to television series Stargate SG1 following The Ark of Truth. It is directed by Martin Wood, director and producer of many episodes of Stargate SG1 and Stargate Atlantis, written by SG1 and Atlantis creator Brad Wright, and produced by Wright and Ark of Truth director Robert C. Cooper.

SG1 and Jack ONeill attend a Tokra extraction ceremony for Baal, the last of the Goauld System Lords. Baal claims, however, that he is merely the last clone and that the real Baal has a failsafe plan. The real Baal travels back in time to 1939 Earth and massacres the crew of the Achilles, the ship carrying the Stargate to the United States the captain lives long enough to drop the bomb Baal left overboard and keep the ship from being destroyed. In the present, people and objects start disappearing, including Vala Mal Doran and Tealc. Jack is killed by the clone, but Samantha Carter, Daniel Jackson and Cameron Mitchell reach the Stargate. They are surprised to emerge inside the derelict Achilles, which has drifted to the Arctic Baals actions have created a timeline in which the Stargate Program never happened. After escaping from the sinking Achilles, they are rescued by a team led by Colonel Jack ONeill. Although General Landry believes their story after intensive interrogation, they are denied permission to change the timeline. In the alternate timeline, Daniel is still trying to convince people about his theories of the pyramids, Carter died in a space shuttle accident and Mitchell does not exist at all because his grandfather was the Achilles captain. The three are separated and given new lives to lead.A year passes, and SG1 is called back into action when Goauld scoutships appear. Baal has brought the other System Lords under his control and now stands ready to conquer Earth, with Qetesh, still residing in Valas body, as his queen and Tealc as his First Prime. SG1 is brought to President Henry Hayes and General George Hammond, who inform them that, based on SG1s accounts, they have recovered the Antarctic Stargate and are excavating the Antarctic Ancient outpost to reach the weapon that saved Earth in the original timeline. SG1 is sent in F15s to McMurdo Station to gate to Proclarush Taonas, another Ancient outpost, to retrieve a Zero Point Module to power the

Source: Wikipedia