Upon knowing how to send their consciousness back to our time, a group of survivors of travelers live in future and struggle against the destruction they face there, return back and impersonate the lives of ordinary people, as they work secretly, in order to prevent those problems to take place.
It's hard to find a fresh take on the time-travel conceit, since it's been around so long and has been so heavily mined lately, but Travelers has some attention-grabbing flourishes and fine acting.