![Supergirl Season 1 Episode 18 Supergirl Season 1 Episode 18](https://image.tmdb.org/t/p/w185/40irkee2qIWZuq8RCI8r0hlMWB8.jpg)
Supergirl Season 1 Episode 18
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.
Views: 88
Serie: Supergirl
Director: Nick Gomez
Guest Star: Brit Morgan, Chris Vance, Christopher Showerman, Grant Gustin, Harriet Sansom Harris, Italia Ricci, Jenna Dewan
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