Barry & Oliver Seek Supergirl For Help In First 'Elseworlds' Crossover Episode

Barry Allen, Oliver Queen and Kara Danvers gather up to figure out what the heck is going on in this new still from the Elseworlds crossover event.

In the first part of the crossover between Arrow, The Flash and Supergirl, Barry Allen (Grant Gustin) and Oliver Queen (Stephen Amell) wake up one morning and realize they have swapped bodies with each other.

Now, the two are determined to find out what disturbed the timeline to cause such a shift.

However, things quickly go from bad to worse when they present their case to Team Flash and the gang doesn’t believe them. Barry and Oliver realize they need Supergirl’s (Melissa Benoist) help and travel to Smallville on Earth-38 where they end up meeting Kara’s cousin, Clark Kent (Tyler Hoechlin), and intrepid reporter, Lois Lane (Elizabeth Tulloch).

Elseworlds premieres TONIGHT, December 9th @ 8PM ET/PT on The CW!