A South African diplomat visits London, and the men of Special Branch are assigned to protect him.

A German diplomat's daughter is kidnapped by a middle eastern terrorist group. Craven and Haggerty must rescue her before she is killed.

An engaged couple is under heavy surveillance. Though sceptical of their guilt, Craven pursues the case nonetheless.

A physician is under surveillance as a possible security risk.

An outspoken Hollywood actress born in the U.K. comes to star in a London play.

When an ex-CID officer barricades himself and a hostage in a building with multiple bombs, Special Branch is called in.

A junior defense minister's missing husband turns up dead.

A group of London youths are linked to several deadly bombing attempts.

Special Branch officers North and Craven are asked to protect a former Nazi collaborator.

Haggerty's father is beaten into a coma in the latest of a series of attacks.

Craven busts a fraudster for carrying an unlicensed firearm and forged passport.

Tensions mount as Craven and Haggerty are on a stakeout.

DCI Alan Craven is accused of taking bribes.