The Outer Limits (1995) - Season 7 Episode 15 -

A 60s radical's daughter ventures back in time to undo the bombing which killed him. But the time travel institute who recruited her as a trainee races to stop her before she irreparably damages the future. The institute plucked Lorelle out of a fatal car wreck, so she can't return to 1989, but her mother is devastated by her husband's death, so Lorelle hopes to affect the past to improve her mother's life.