On Supergirl Season 4 Episode 10, Alex does her best to trip up Colonel Haley who is going to extreme lengths to figure out Supergirl's identity.

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On Supergirl Season 4 Episode 10, Alex makes a life-changing decision to help keep Supergirl's identity a secret from Colonel Haley. Brainy tells Nia to follow her dreams while J'onn finds his new calling in life.

Episode Details

On Supergirl Season 4 Episode 10, Colonel Haley and Supergirl clash when she handles a distress call from a Navy ship that turns out to be an alien attack.

Rating: 4.3 / 5.0 (68 Votes)
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Supergirl Season 4 Episode 10 Quotes

How do you think we keep this country safe? Every soldier in every war has had to things they considered awful. Now this is reality. Sometimes reality is messy. And it's ugly and uncomfortable. And you end up doing things you thought you'd never do.

Colonel Haley

Just because I don't work at the DEO anymore doesn't mean I'm going to stop being a hero. No matter what you say.