I've seen the commercials for Timeless, and think the show looks interesting, but haven't actually ever watched. A 2 hour movie should be fun, though, for the fans. Enjoy.
I tried to start a thread about Timeless a while back, but I didn't really get a lot of responses. I guess there aren't that many fans out there. I love the show and would be happy to discuss the finale with you. They did indeed tie up some loose ends, but also left things wide open for a sequel (can tv shows have sequels?). It doesn't hurt to dream, I guess!
I just Googled and see that Timeless was already cancelled and this was an extra to wrap up the show. Sorry for you fans that it's over, but glad you got a finale.