There’s a new superhero in National City and his name is The Flash. Having travelled to an alternate network the Scarlet Speedster teams up with Superman’s cousin for some crossover action in the Supergirl episode “World’s Finest”. It airs in the US next Monday. For us in the UK it’s just a shame it’s an episode of Supergirl featuring The Flash and not the other way round as that means we’ll have to wait way, way longer to see it (Supergirl doesn’t start up again on Sky until April whereas The Flash is already catching up with its US scheduling).
You can see the episode’s photo gallery here.
The official synopsis reveals: “Kara gains a new ally when the lightning-fast superhero The Flash (Grant Gustin) suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home.”