The investigation into a woman's untimely death leads investigators to a drunk and her former boyfriend.

Sergeant Friday and Officer Gannon are called to a theater to investigate an acid-throwing incident. Traced to his home, a teenage suspect runs away — carrying a live grenade.

Sergeant Friday is in real trouble when he shoots and kills, in self defense, a man he catches jimmying a coin changer who opens fire on him. But he can’t seem to find the robber’s spent bullet.

A Midwestern businessman is swindled by shakedown artists who pose as vice officers. Sergeant Friday and Officer Gannon go undercover at the same hotel, with Gannon playing the role of a manufacturer from Nebraska.

A bank robber forces female passersby to help scoop money into a pillowcase while holding the bank’s employees at gunpoint. Sergeant Friday and Officer Gannon receive unexpected assistance from an involuntary “helper".

Sergeant Friday and Officer Gannon can’t even enjoy a quiet football game at Gannon’s home in their off-duty hours when phone calls from Gannon’s neighbors with their petty gripes keep disturbing them.