Arrowverse's 'Elseworlds' Crossover Ends Tonight - Get a Sneak Peek Here!

Barry and Oliver look they ventured into the wrong side of town in this still from the conclusion to the Elseworlds crossover event.

In tonight’s new episode, Supergirl (Melissa Benoist), The Flash (Grant Gustin), Green Arrow (Stephen Amell) team up with Superman (Tyler Hoechlin) for the battle of their lives.

This is also the ep where Alex (Chyler Leigh) doesn’t know that Kara is her sister!

Tune in TONIGHT, Tuesday, December 11th @ 8PM ET/PT on The CW.

Check out an inside look at the final part of the crossover below!