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.