S2, E7: This special crossover episode sees Supergirl, The Flash, Green Arrow and DC's Legends of Tomorrow unite against an alien race called the Dominators.
Starring Stephen Amell, David Ramsey, Emily Bett Rickards
S2, E7: This special crossover episode sees Supergirl, The Flash, Green Arrow and DC's Legends of Tomorrow unite against an alien race called the Dominators.