Behind the scenes featurette on Supergirl, Arrow, Flash, Legends DC TV crossover

This is gonna be huge.

Go behind the scenes of the 4 night crossover event with #Supergirl’s @MelissaBenoist! #DCWeek starts TOMORROW at 8/7c on The CW. pic.twitter.com/6SYqSz4lpm

— Arrow (@CW_Arrow) November 27, 2016