Let Him Die – Two firehouse members are abducted, triggering a desperate search by the Chicago P.D. Elsewhere, Casey and Dawson struggle to balance their personal and professional lives, and Chief Boden deals with news that his newborn has potential complications.
Madmen and Fools – Casey helps out his sister while taking down his shady brother-in-law. Meanwhile, Brett assists a mother in need; Mills learns about unlicensed private investigation; and Hermann starts training Dawson.
The Nuclear Option – Lieutenant Casey deals with the fallout of his sister Christie’s impending divorce. Meanwhile, Dawson and Mills settle into their new roles at Station 51. Elsewhere, Brett can’t decide if she wants to leave Chicago and the Molly’s crew still can’t figure out how to get the food truck started.
Apologies Are Dangerous – Dawson tries to strike a balance with Casey during her first day as a candidate. Meanwhile, Mills ponders an uncertain future; Severide faces his demons; and a city inspector visits Molly’s.
Just Drive the Truck – A crash involving fire trucks from Firehouse 51 and the Austin firehouse results in drama and blame-shifting. Elsewhere, Boden makes a plan to get Dawson her badge; Mills deals with his past and his future; and the Molly’s gang have trouble with their new food truck.
Wow Me – Lieutenant Severide returns to Firehouse 51, but he is clearly not his usual self and Dawson counts down the weeks until she gets started as a candidate at the Austin Firehouse. Meanwhile, Mills learns more about his father’s family and Herrmann asks the rest of the Molly investors to come up with some new ideas to turn the business around.
Always – Boden and the rest of the Firehouse 51 team deal with the explosion’s aftermath in the Season 3 opener. Meanwhile, Casey searches for Severide, who’s gone missing; Newhouse has surprising news about Mills’ family; and Hermann and Otis make a decision about Molly’s.
Real Never Waits – A fire at a boarding school leaves Lt. Severide shaken and wondering if he could have done more. Meanwhile, with the firehouse in full support of Dawson as she retakes the fireman’s exam, Lt. Casey attempts some political maneuverings on her behalf. Elsewhere, Mills looks for answers about his father’s mysterious past and Chief Boden’s grand plans take a det…
One More Shot – With everyone’s support, Dawson makes final preparations to retake the fireman’s exam, but a call to the field may throw a major wrench into her plans. Elsewhere, Lt. Casey has…
A Dark Day (1) – Lt. Casey and Dawson volunteer to help at a charity run at Chicago Medical when a massive explosion sends Chicago into chaos. With one of their own missing in the blast, the firehouse is tested like never before.