Source Code (2011)

A soldier named Stevens wakes up in another person's body and learns that he is part of a government program called the Source Code. He is tasked with finding a bomber on a commuter train, but each mission lasts only 8 minutes. As he repeats the time loop, Stevens uncovers more about the terrorist attack and his own personal situation. Determined to save the people on the train and his love interest, he defuses the bomb and sacrifices himself to ensure their safety.