The series 'Travellers' on Netflix. Someone recommended this to me. The premise is travellers from a post apocalyptic future download into present day bodies to try and change history. They're not stealing the bodies as such, but download into them just at the point of death, which they know is going to happen as to them, it's history. These travellers bring their advanced knowledge, and training with them.
Yeah, a bit far fetched, and of course, time travel paradoxes abound, but it really is quite well done.