Worlds Finest
Show: Supergirl --> Season: 1 - Season 1
AirDate: 3/28/2016
Runtime: 43
Voting: 7.3 (33)

Overview: 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.
Jenna Dewan
Lucy Lane
Chris Vance
Non
Brit Morgan
Leslie Willis / Livewire
Harriet Sansom Harris
Sinead
Grant Gustin
Barry Allen / The Flash
Christopher Showerman
Tor
Italia Ricci
Siobhan Smythe / Silver Banshee
Jay Jackson
News Anchor
Sarah Robson
Dr. Amelia Hamilton
Dan Warner
Fire Chief
Dawn Greenidge
Pedestrian Woman