Sam Becket is working on a DoD funded project to time travel. If it worked it would send him back in time to inhabit the body of anyone, so long as it was within his own lifetime (so no going back before he was born). The project was being shut down, so he took a chance and used it on himself. It worked, everything but the part about being able to get him back when they wanted to. The show is about him leaping around time, inhabiting the bodies of various people from the 50’s to the late seventies. They can talk to him through Al, a hologram of his friend in the future that only he could see. Each leap he had to fix something, then he would leap out (almost all the episodes are one leap).
The show is a good example of using the vehicle of science fiction to tell very human stories. The things he fixed were often about changing people, or having someone not make a mistake that hurt them or others. For example in one he was sent back as a rich man’s servant. The rich guy was foreclosing on a mission around Christmas time. His job was not the save the mission, his job was the get the rich guy to WANT to save it, to see that money was not everything. He was there to save the mans soul. What he was sent to do were often turning points of people’s lives, trying to convince people to do right, but not forcing them to.
It was thoughtful and insightful about things in ways that modern
Hollywood isn’t anymore.