"Window of Opportunity" is the sixth episode from season 4 of the science fiction television series "Stargate SG-1", and first aired on the American subscription channel Showtime on August 4, 2000. The episode is based on a time loop scenario, with SG-1 team members Colonel O'Neill and Teal'c repeatedly reliving the same ten hours after a mission on a planet. Since the rest of their team and all personnel at Stargate Command are unaware of the happenings and do not remember the time resets, O'Neill and Teal'c are forced to find a solution on their own.