In the "World's Finest" episode of Supergirl, Melissa Benoist's Girl Of Steel finds herself teamed up with Grant Gustin's Barry Allen, AKA The Flash - the fastest man alive. Barry has traveled to Earth 2 to help Kara battle the villainous duo Silver Banshee and Livewire. The episode airs in the US on March 28th.
Warner Brothers has released 17 photos from the episode and a trailer, which can be found below.
