Plot Holes? SPOILERS of course!
I read the posts about the "Belinda" factor in the ending. Lots of good theories there... that's why I come here. Aside from a few trolls and arguments, lots of IQ points at work!
HOWEVER...
For me, the big hole is, why are they going back for Darius' mom? She apparently lied about her mom being dead... she tells Jeff (magazine writer) her parents merely divorced.
Is this, then, a wasted trip based on two lies (Belinda nor mom are dead)?
I did like the way the title referred both to the time travel risk and the risk of relationships. I don't know about the former, but boy do I know about the latter!