Supergirl Season 2 Episode 4
Survivors
When Kara and Alex investigate the murder of an unregistered alien, the trail leads to an alien fight club run by Roulette, the ringmaster who commands aliens to fight in mortal combat for the entertainment of rich humans. While trying to stop the fighting, Supergirl and Martian Manhunter find themselves up against a surprising opponent. Meanwhile, Hank is thrilled to have found another Martian and tries to get to know M'Gann better. Supergirl takes Mon-El under her wing and begins to train him.
Guest Stars
Katie McGrath
Lena Luthor
Laura Benanti
Alura Zor-El
Ian Gomez
Snapper Carr
Dichen Lachman
Veronica Sinclair / Roulette
Ian Casselberry
Quill