How did Supergirl feel about going up against Reign?
That was revealed on Supergirl Season 3 Episode 9 when mysterious symbols started popping up across National City.
Things took a surprising turn when someone Kara has become really close to is revealed to have a villainous streak that could be linked to a World Killer.
Meanwhile, the tension between Lena and Morgan Edge continued to rise, but which one of them made the first move?
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Get caught up on all the latest drama now.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.