Who was the killer close to?
That was revealed on The Alienist Season 1 Episode 5 when the team learned a shocking new fact about the person they were pursuing.
Meanwhile, Moore and Sara shared an intimate moment that threatened to derail the whole case.
Also, Kreizler turned to an old mentor for some advice when the leads in the case started to dry up.
What did he decide to do in the aftermath?
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Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.