After Regan’s car is stolen with invaluable surveillance photos from a stakeout, the thief gives a heads-up to Sweeney’s target.

Regan’s flying squad falls under suspicion after they apprehend a gang of hijackers, but a bag with 35,000 pounds in it has somehow disappeared.

Regan clashes with an arrogant police superintendent when a crime kingpin is allowed to leave the country and go to France.

After a high-powered lawyer gets three petty thugs off on a murder charge, Regan is authorized to use whatever means necessary to bring the hoodlums in.

Regan is convinced that Eddie Boyse, a recently released career criminal, is responsible for a robbery, but Boyse was with Regan when the crime occurred.

When the Superintendent finds out that there is a bank robbery in progress on a Saturday afternoon, he assigns Regan to visit an old girlfriend whose apartment is adjacent.

Regan adopts a new identity as an ex-con and goes undercover as a truck driver to expose a hijacking ring.

When seedy informant Harry Fuller is spotted by Regan in a pub flush with money, he knows something is up and interrogates Harry.

After their own getaway driver is killed fleeing police, a gang blackmails a young policeman into being their driver by kidnapping his bride.

The Smith Brothers, a vicious group of mobsters, abandon their usual strong-arm tactics to run a parking ticket scam at a car park.

After Danny Keever, a convict on weekend release and due for parole, is framed in a bank robbery, Regan works to clear him.

After Regan gets a tip about an upcoming robbery from a trusted informant, the gang kidnaps his daughter to blackmail him into inaction.