Watch Supergirl Online: Season 2 Episode 21

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How did everyone feel about the return of Cat Grant?

That was addressed on Supergirl Season 2 Episode 21 when the former character appeared in National City to help out with the looming threat of Rhea.

With Supergirl at odds with the President over how to deal with Rhea, Cat had a daring plan that could help save everyone. 

Meanwhile, Alex did not want to work with Lillian, but she was forced to. 

Use the video above to watch Supergirl online to get up to speed with the latest drama for the characters.

Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.

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Supergirl Season 2 Episode 21 Quotes

Winn: Uh guys, I just picked up on some sort of live transmission from Air Force One.
Kara: Air Force One?
Alex: Wait, don't tell me the President is heading towards the conflict and not away.
Kara: Every time I think I can't get happier I voted for that woman...

Kara: James, I'm so glad you're okay.
James: Yeah, me too. It's a war zone out there. Daxamite troops are beaming down from everywhere, setting up checkpoints, arresting resisters. It's almost like they're instituting their own Martial Law.
Winn: Not to mention the full on Independence Day going out there with the mothership hovering over the city.