A serial bomber is on the loose. Will the team with the help from Caine's old bomb squad mentor be able to work out the puzzle and find the bomber?
After a gang member is killed, the Fishers find that his family's wishes for burial differ from those of his gang leader. Nate's girlfriend Brenda (Rachel Griffiths) makes an unfavorable impression during a family dinner.
While Martinez investigates a series of robberies involving a fake ATM machine, Kelly's current case yields evidence that links Licalsi to the mob. Meanwhile, Lt. Fancy tries to extend his custody of a young boy whose mother is in a drug rehabilitation program.
Fancy aids a teenager arrested for heroin possession. Simone and Sipowicz target an ex-con whom witnesses identify as a murder suspect. Medavoy’s friend Abby drops a bombshell.
Nash tries to stop an insane ex-cop with a vendetta against the city from assassinating the Mayor.