Tonight’s episode of “Supergirl” on CBS will feature a guest appearance by The Flash. Grant Gustin (Barry Allen/The Flash on The CW’s “The Flash”) will guest start alongside Melissa Benoist (Supergirl) on a special DC Comics television crossover event.
The episode is titled “Worlds Finest” and will see The Flash help Supergirl against Silver Banshee and Livewire in exchange for her help in getting him back to his proper universe.
“Supergirl” airs Mondays on CBS at 8/7c
“The Flash” airs Tuesdays on The CW at 8/7c