On Supergirl Season 4 Episode 12, Kara teams up with J'onn to help him find a missing man and is pleased to work alongside the DEO when the case coincides with Alex's.

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It's Valentine's Day on Supergirl Season 4 Episode 12 and a heart-eating alien is creating chaos in National City. Kara joins Alex and J'onn to help stop the alien while the Children of Liberty rally behind Ben Lockwood.

Episode Details

On Supergirl Season 4 Episode 12, Kara decides to team up with J'onn on his latest P.I. assignment but it ends up tying directly into Alex's current situation.

Rating: 4.5 / 5.0 (74 Votes)
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Supergirl Season 4 Episode 12 Quotes

Brainy: It never occurred to me that someone as amazing as Nia Nal would ever be interested in me.
Alex: Well, I guess the question is, what do you want?
Brainy: I want her to be my Valentine.

Brainy: Have you ever thought about putting your grief into tiny little boxes?
Nia: That doesn't sound very healthy.