The cast of 'Supergirl' talk about the show's latest villains, Silver Banshee and Livewire in a new BTS featurette for episode 18, titled "Worlds Finest." http://www.youtube.com/watch?v=I_TqbeVG_BA Here are three new clips from episode 18: https://player.vimeo.com/video/160499871 https://player.vimeo.com/video/160535798 https://player.vimeo.com/video/160545898 Official Synopsis: Grant Gustin Crosses Over as “The Flash” “Worlds Finest” – Kara gains a new ally when … Continue reading Supergirl/The Flash Crossover – BTS Featurette and New Clips From Episode 18, “Worlds Finest”