Watch Supergirl Online: Season 1 Episode 12

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There were a couple key storylines to keep an eye on throughout Supergirl Season 1 Episode 12.

Let's take a quick look at them below, shall we?

On this edition of the fun CBS drama, twisted version of Supergirl caused some major problems for our heroine.

She was the mirror image of the Kryptonian superhero - she was dead set on destroying her National City counterpart. We told her that she caused major problems for Kara, right?

Meanwhile, on a personal level, Kara grew much closer to Cat's son, Adam.

Did they swap any spit? Use the above video to watch Supergirl online and find out now.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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Supergirl Season 1 Episode 12 Quotes

Alex: I sent a team to scan the area. No signs of extra-terrestrial activity so we can probably rule out an alien shape-shifter, unless there's something you're not telling us.
Hank: The skirt was surprisingly comfortable, but no.

She's as strong as me, she flies like me, she fights like me. Except for the fact that she talks like Cookie Monster, she's exactly like me.