Platt and Tay On Duty - Chicago PD Season 4 Episode 4

Sgt. Trudy Platt (Amy Morton, left) and Off. Julie Tay (Li Jun Li) on duty in 'Chicago PD.'
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An Attack On a Concert - Chicago PD

The team must figure out if an attack at a concert is an act of terrorism on Chicago PD. "Big Friends Big Enemies" is the fourth episode of the show's fourth season.
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