Kate, Raina, Nate, Magda, and Jinny must find a way to get Stacy, the principal, and 10 students out of the school safe and sound when they're held hostage by armed terrorists. The team meanwhile must figure out who these people are and why they're doing this. Also, Jinny and Hank get married.
The inspectors look into the murder of a pregnant woman and wonder if her husband could be connected in the murder. The inspectors learn that he was rock climbing alone at the time of the murder. Later, new suspects keep popping up and in a shocking ending that will leave you speechless, the murderer is revealed.
Raina and the missing woman are trapped together in the small basement with no apparent way out. Kate, Nate, Stacy, and Magda meanwhile are shocked to learn the surprising identity of the kidnapper and are extremely worried when they learn that Raina has gone missing.
Nate and Raina look into the Suicide of Tom Burke who worked at the same facility that Irene (Nate's sister lives. Irene believes Tom was murdered. While Nate questions Bob about Tom Burke and weather Tom took his medicine they find out Bob did not't give out medication. Raina & Nate wonder how Tom got his medicine.
Internal affairs looks into whether Jinny followed police procedure in an incident in which she shot the man who killed her brother (in the season 3 finale). Raina must testify about her part in the incident and is faced with a serious decision. Nate and Raina look into a suspect's hunger for sex possibly linked with a murder.
Jinny & Magda are trying to find burglar Grant coal train but they must deal with a bounty hunter who is also looking for the burglar. The methods used by the bounty hunter drive Jinny & Magda crazy. Kate fights to keep her Granddaughter from the surrogate mom that wants to adopt her.
The Division is an American crime drama television series created by Deborah Joy LeVine and starring Bonnie Bedelia. The series focused on a team of women police officers in the San Francisco Police Department. The series premiered on Lifetime on January 7, 2001 and ended on June 28, 2004 after 88 episodes.