Supergirl Season 2 Episode 4
Supergirl S02E04: 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.
Serie: Supergirl
Director: James Marshall
Guest Star: Dichen Lachman, Ian Casselberry, Ian Gomez, John DeSantis, Katie McGrath, Laura Benanti, Sharon Leal