On Monday, The CW's "The Flash" is about to embark on (another) multidimensional journey -- but this time, he's going to land smack dab on "Supergirl's" earth. Across four new clips from "Worlds' Finest," Barry Allen meets Kara Danvers and her friends for the very first time. He also explains the concept of the multiverse -- during which time he makes a reference to the Crime Syndicate-run Earth-3 -- and encounters Cat Grant, while Siobhan Smythe teams up with Livewire.
"Supergirl" airs Mondays at 8 pm EST on CBS. Developed by producers Greg Berlanti, Ali Adler and Andrew Kreisberg, the series stars Melissa Benoist, Calista Flockhart, David Harewood and Chyler Leigh.