Giles Nunn and Carrie Selhurst are an upper crust couple who, partly for kicks and for the profits, commit highway robbery in lonely country lanes, along with the lower class boy Tommy Garret, whose dad is a friend of George Carter. Regan is on to them and Carrie gets arrested, but her unwillingness to cooperate leads to the death of the next victim.

When a gang hijack an armoured security truck, Regan, Carter and the Flying Squad set up an ambush to catch the crooks. But who's the informer ?

An informant of Regan’s tells him about a hijack involving a lorryload of cigarettes where he will be the look-out man. But can Regan trust his snout?

Regan loses his patience with a thug he is questioning about a wages snatch, and soon the press are sniffing round for a police brutality story.

A case of mistaken identity provides tragic circumstances when a hit goes wrong; Regan and Carter manage to break the hit-and-run ring, and then try to stop another accident.

Regan and Carter are confronted by a newsman with information on an unsolved robbery. And why are the pair being photographed ?

Violent criminal Vic Labbett returns to England to recover the proceeds of an earlier robbery, and Regan and Carter must stop him before he can get his hands on the loot.

Regan and Carter are on the case when a pair of robbers are themselves robbed at gunpoint.

Regan and Carter investigate an art deal that is more than it seems, and ends up in a wasteground shoot out.

Regan's snout is abducted after passing on information about a switch of some stolen diamonds. Regan and Carter must catch the villains while protecting their source.

Regan and Carter are called in when alarm bells start ringing all over their patch. Who is setting them off - and why?

Regan and Carter are called to a siege at a bank, where two armed robbers are holding hostages.