Lindsay goes undercover in a prison to get close to a key informant, but the stakes turn deadly when the operation is compromised. Meanwhile, Voight plays a dangerous game of his own — and a shocking betrayal leaves the entire unit reeling.

Trust no one. Forgive nothing. 👊

#ChicagoPD #OneChicago #TheNumberofRats #Linstead #Voight #PoliceDrama #NBC

Here’s a post generated for Chicago P.D. Season 3, Episode 22 (“The Number of Rats”):