As Antonio’s (Jon Seda) life is now in question, Voight (Jason Beghe) and Platt (guest star Amy Morton) open up about their pasts. Jin (Archie Kao) is caught while tinkering with Voight’s computer and uses the only scapegoat possible to keep him in the clear. At the same time with Charlie (guest star Billy Wirth) back in town Lindsay (Sophia Bush) realizes she’s going to have to come clean about a few things. Halstead (Jesse Lee Soffer) finally gets answers he’s been wanting about Voight’s and Olinsky’s (Elias Koteas) past.
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