With Eric still missing, Maggie returns to town. Carter tells Abby he wants to marry her. Weaver gives Luka an ultimatum regarding his job. Chen tells Pratt about her son. Sean Simmons returns with pneumonia. Pratt, riding with the paramedics, pronounces a derelict dead, but the man is later discovered alive by Gallant in the morgue. Weaver has her purse snatched on the street by a perpetrator who later appears in the ER as a patient.