Supergirl › Season 1

S1 E18: Worlds Finest

Name: Worlds Finest
Released: 2016-03-28

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.

Air date	Mar 28, 2016
Runtime	43 minutes
TMDB rating	★ 7.2/10