At the end....
Just watched this, and i think i'm getting confused on a really simple detail, but it's preventing me from understanding the end properly!
Does the version of Doug at the very end of the film, who drives away with Claire, know anything about the time travel that has gone on in order for the situation to have occurred?
And then therefore we are left to assume that Doug & Carroll get together in a completely separate way (assuming Carroll doesn't try to tell Doug?)