S1·E18 Worlds Finest
Aired March 28, 2016 43 min ★ 7.2/10 · 46 TMDB votes
Synopsis
Kara gains a new ally when the lightning-fast superhero The Flash 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.
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Director & writers
Guest stars
Jenna DewanLucy Lane Chris VanceNon Brit MorganLeslie Willis / Livewire Harriet Sansom HarrisSinead Grant GustinBarry Allen / The Flash Christopher ShowermanTor Italia RicciSiobhan Smythe / Silver Banshee Jay JacksonNews Anchor Sarah RobsonDr. Amelia Hamilton Dan WarnerFire Chief Dawn GreenidgePedestrian Woman
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