Watch Supergirl Season 1 Episode 3 online via TV Fanatic with over 1 options to watch the Supergirl S1E3 full episode. Affiliates with free and paid streaming include Amazon.

Episode Details

On Supergirl Season 1 Episode 3, Reactron, one of Superman's formidable enemies, arrives and targets Supergirl while Cat plans to run an exposé.

Rating: 3.4 / 5.0 (83 Votes)
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Supergirl Season 1 Episode 3 Quotes

James: How's the covert alien hunting business?
Alex: Not as covert as we would prefer.

Waitress: How can you eat sticky buns every day and still stay so thin?
Kara: I'm an alien.