Synopsis

Kara and Alex’s investigation into the death of an unregistered alien uncovers a disturbing truth: a clandestine alien fight club, orchestrated by Roulette. She commands beings from across the cosmos to engage in lethal combat, all for the amusement of wealthy humans. As Supergirl and Martian Manhunter attempt to dismantle this brutal enterprise, they face an unexpected adversary. Elsewhere, Hank is delighted by the discovery of another Martian and seeks to forge a connection with M'Gann. Meanwh