Did Lena vow to stop her brother?
On Supergirl Season 6 Episode 2, the stakes were higher than ever before, and it was time for Lena to pick a side.
Meanwhile, Supergirl and her team were faced with a challenge unlike anything they've ever dealt with before.
With Alex confused about what to do next, it came down to a split-second decision who survived.
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.