Kara gains a new ally when the Flash arrives from an alternate universe and helps her fight the Silver Banshee and Livewire in exchange for her helping him return home.
Silver Banshee
Clips Previewing The Flash and Supergirl Crossover!
Poster and Synopsis for The Flash and Supergirl Crossover!
In early February we got the confirmation of our dream crossover event. The Flash would be traveling over to National City to team up with Supergirl! Today CBS revealed the official poster and a plot description for Episode 18 titled "World's Finest" is set to air on March 28th.