DC Comics' alien invaders the Dominators will be the villains in the CW's four-way crossover among Arrow, The Flash, Legends of Tomorrow and Supergirl ...

Fans will get to see the Dominators in action later this season on The CW. "The Flash" premieres on October 4, "Arrow" premieres on October 5, "Supergirl" premieres on October 10, and "Legends of ...