Special Branch - Season 3 (1973)

Haggerty's father is beaten into a coma in the latest of a series of attacks on travelers. At first the case falls outside of Special Branch's jurisdiction, but when sensitive government documents are stolen from the next victim, the team launch a manhunt

Special Branch officers North and Craven are asked to protect a former Nazi collaborator. Although they have contempt for the man and their assignment, they must shield him from those who remember his old war crimes.

A group of London youths are linked to several deadly bombing attempts. With connections to the IRA, the Communist Party and anarchist elements, the group continues their plot, while the Special Branch works with an explosives-disposal expert to stop them

A junior defense minister's missing husband turns up dead. Highly placed people push for immediate investigation of the case, as growing evidence indicates a suspicious cause of death. Special Branch must learn if it was an accident, suicide, or murder.

When a psychotic ex-CID officer barricades himself and a hostage in an office building, lacing it with multiple bombs, Craven and the Special Branch team are called in. Time ticks down as negotiation fails and the man threatens to set off the detonator.

An outspoken Hollywood actress born in the U.K. comes to star in a London play. Acting on a warning from the FBI, the Special Branch officers attempt to protect her from a highly credible murder threat by a group of right-wing extremists.

A physician is under surveillance as a possible security risk. Despite accusations of the doctor leaking politically sensitive trade secrets from a former Special Branch officer's business, Craven grows increasingly uncertain that the man is a traitor.

A recently engaged couple is placed under heavy surveillance due to the groom-to-be's international ties. While Craven is skeptical of their guilt, he doggedly purses the case nonetheless.

A German diplomat's daughter is kidnapped by a Middle Eastern terrorist group. Craven and Haggerty must rescue her before she is killed. But time works against the detectives, and events build to an explosive conclusion.

A South African diplomat visits London, and the men of Special Branch are assigned to protect him from an anticipated assassination attempt. But DCI Craven worries about Sgt. North's effectiveness and doesn't find the diplomat's attitude helpful.