Trailer
https://www.youtube.com/watch?v=4glJzvUunOE
I love the Time Travel genre, but this seems to be a bit overkill this year with so many others using the same plot device (Legends of Tomorrow, 12 Monkeys, 11.22.63 just off the top of my head. Trailer looks okay. I may tune in to the Pilot to see if I want to go further.