'Supergirl' TV Series Adds 2 Cast Members - Kara's Sister and Cyborg Superman

Warner Bros. TV
The upcoming CBS action/drama 'Supergirl' has announced a pair of cast additions.

Chyler Leigh and David Harewood will play two popular characters from the DC Comics, Alex Danvers and Hank Henshaw, a.k.a. Cyborg Superman.

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