CADMUS attacks National City with a kryptonite powered villain who ends up seriously hurting Supergirl. Superman blames Hank because the kryptonite was stolen from the DEO. Meanwhile, Kara’s first day at her new job doesn’t go as planned after she meets her new boss, Snapper Carr.
The crossover episode is almost here! Check out the promo video for The Flash and Supergirl crossover below.
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.