- Unintentionally Unsympathetic: Alex spends the whole episode acting like an overly aggressive, trigger-happy maniac far more than seems justified by the eventual explanation of how much she's missing Maggie. Add in the most obvious difference between Purity and the show's usual villains being that she's black, and it's really not a good look for anyone. Quite a few fans have said they spent the whole episode expecting a reveal that Purity was messing with her head, and were severely let down when we're supposed to accept it really was just her the whole time.
http://tvtropes.org/pmwiki/pmwiki.php/YMMV/Supergirl2015S3E13BothSidesNow
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