Time travel
The popular British TV program Doctor Who is about an alien who has adventures by time travelling in a space time machine grown and built on Gallifrey.  Another TV show about time travel is the series Charmed.  Instead of using machines and science, this one uses magic to go to other times and places, Quantum Leap is another show which features "leaping" a form of time travel that allows a person to "relive events of another in history" it is similar to "Assassin's Creed" but in Quantum leap you can actually change history not just merely relive and shape it.