Rachel Cerda

Lindsay (Sophia Bush) has her first case with the task force and realizes she needs to call on Voight (Jason Beghe) and the Intelligence unit to assist. Meanwhile Burgess (Marina Squerciati) is back on the job, but relegated to desk duty which allows Desk Sgt. Platt (Amy Morton) the opportunity to partner up with Roman (Brian Geraghty).

Dawson attempts to help her brother Antonio unravel the details of his drugs-and-gang investigation, and goes behind his back in turning to an unlikely source for assistance. Casey and his mother, Nancy struggle with their new relationship. Meanwhile, as a favor to Lieutenant Whaley, Severide visits someone important from his past, while Herrmann and Otis learn some hard truths about their "silent partner" in the bar.

When a subway train goes off the tracks, Crockett volunteers to help the victims. Vanessa and Will must decide if they're willing to risk their jobs to save a patient. Hannah and Archer clash over a pregnant patient.

Transferred to the psych ward, Michael tries to clear Haywire’s head and jog his memory of the missing piece of the blueprint tattoo; Bellick wants to auction off Michael’s cell to the highest bidder; C-Note and T-Bag must team up in a high-stakes poker game, while Sucre’s cousin Manche seems to hold all the cards.

When the FBI takes over Firehouse 51 for an undercover mission, Casey and Severide volunteer to assist with the investigation. Kidd attempts to help Severide come to terms with recent developments he's been managing.