What was the new interest that put Patterson on the outs with Rich?
On Blindspot Season 4 Episode 20, the pair butted heads when Patterson seemingly made a move without his knowledge.
Meanwhile, a horrifying and vengeful villain returned to haunt the FBI, and it was up to Weller to take the person down.
Who was it?
Elsewhere, Zapata and Reade tried to navigate their living situation.
What was standing in their way?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.