1. Hostage, Part 1

Complete story — includes the ending

Pembleton returns to duty over the objections of the top brass, who want him shipped to a position with no responsibilities, but he has trouble coping with the physical and mental limitations placed on him by his stroke recovery. Gee learns that Russert might have moved to France to live with a diplomat whose baby she is carrying, while Bolander retired and Felton's whereabouts are unknown. With Pembleton on desk duty, this leaves the unit understaffed. Bayliss and Munch team up on the shooting death of a Mrs. Uba, with a pet pig as the only witness. As they begin to track down her son, who owns the pig, a gunman invades a middle school and takes a classroom hostage after killing two staff members. Most of the homicide unit is called in to assist.