Season 12

Gunshots at a wedding lead to chaos in the E.D. Goodwin defends herself under threat of being fired. Hannah makes a decision while on maternity leave.

Subway surfers enter the E.D. with serious injuries. Hannah and Abrams employ a surprising creature to help stabilize a patient. Charles looks to solve a mysterious case.

Frost and Charles try to protect a young burn victim. Ripley and Hannah get creative after treating an unhoused pregnant woman. Archer gets unwelcome news.

Charles clashes with a colleague when he diagnoses their family member. Frost considers his future. Someone from Goodwin's past reappears.

Suspicions abound when a young injured boy and three burn victims are brought into the E.D.; Sgt. Platt visits Gaffney to probe a cold case. Frost gets some news.