Under the Gun

S1 E2305/15/13
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Casey agrees to participate in a sting operation to catch Hallie's murderer, but when the plan goes haywire, Casey finds himself in the clutches of a ruthless killer.

Appearing:Jesse Spencer
Tags: casey, Train, chase, murderer, Sting, police, chicago pd, el train, gun, gunpoint, hostage, voight, Antonio, pursuit
S1 E2304:01ExcerptDramaPrimetime