The death of a nightclub comic takes Frank undercover to investigate a suspected drug ring.

Frank and Norberg go undercover to investigate a protection racket.

Frank's investigation into the bombing of a courtroom leads to a man who was convicted by him in the past.

The daughter of a textile tycoon is kidnapped and Frank must find her before it's too late to pay the ransom.

Frank investigates a veteran boxer who lately has been throwing his fights. He takes the boxer under his wing in order to expose the boxer's corrupt manager. Unfortunately, the manger has kidnapped the boxer's girlfriend and put the boxer's title fight in jeopardy. Frank now tries to save the boxer's girlfriend in the hopes that the boxer won't have to throw the match so he can have a shot at rejuvenating his career in the ring.

Sally, a bank teller deeply in debt, robs her own bank and plants evidence that implicates a fairly commonplace man who was present during the crime. Police Squad, a special unit of the police force, is called to investigate a double shooting that happened during the robbery. However, the stories just don't add up. The evidence builds and points in Sally's direction, but it's up to Frank to find the clues that will put her away.