Window of Opportunity

S4, E6: While exploring planet P4X-639 the SG-1 team meets Malikai a human explorer from another world who shares Dr. Daniel Jackson's interest in an alien computer covered in a strange Latin-like script. As solar flares flash from the red sun overhead Malikai warns Daniel that the geomagnetic disturbance may be dangerous to the SG-1 team and tells him to leave. When Daniel ignores him Malikai zaps him with a weapon and begins to program the alien computer. Maj. Samantha Carter and Teal'c rush to Daniel's aid and are caught with Malikai in a mysterious blue light. Suddenly they find themselves back at Stargate Command ten hours earlier preparing to head off on the mission from which they've just returned. And then it happens again. And again. And again. As Col. Jack O'Neill returns to eat the same plate of Froot Loops over and over again he realizes that SG-1 is caught in a time loop and that only he and Teal'c retain their memories through each ten-hour cycle. It's up to them to decode the message on the mysterious machine and figure out a way to break the loop.