Jordan goes undercover as a prisoner to uncover a convicted spy's secrets.

Jordan flies to Frankfurt to escort a British subject, Selby, back to England. Selby had disappeared three years earlier in East Germany and the British Government are anxious to learn what he's been up to - but the Russian KGB hide in the shadows.

An ex-colonial policeman is pressured to return to Africa to testify at the trial of a onetime Mau-Mau warlord, but he adamantly refuses.

What appeared to be a straightforward case - protecting the wife of a foreign VIP, who has entered a beauty competition in the cause of female emancipation for her own country - turns into a nightmare situation for DCI Jordan.

An accusation of theft against a highly respected Greek historian sets the Special Branch team a problem. Interpol have requested his extradition from England - but Inman isn't satisfied with the facts of the case.

Inman meets the CIA's new man in London. Jordan meets an old friend from Moscow. All perfectly legal - until the two are seen together at intervals and the Special Branch team become involved in international politics.

Is an eminent scientist, on lone to a top-secret research establishment, a security risk? That's the question facing Inman and his team. The research establishment is suddenly prone to 'leaks'. Has the man been got at?

While a member of the SB team keeps watch on Karl Peter's flat, Inman and his team scan though his charge sheet. They believe he will attempt to incite London dockworkers into taking industrial action against their employers.

When military security intercepts letter written to a lonely serviceman by his foreign 'penpal' Rita, which contain casual references to secret information, Supt Inman sends DS Jordan to investigate.

When a Czech au-pair goes missing in London and her father is one of the most powerful men the country, Inman and Jordan must find out what's happened to her. But their enquirers lead to a dead end.

When Inman discovers that "The Guardians" are taking a more-than-usual interest in a group of pro-germ-warfare people and finds that their leader is a pretty girl, he decides to send Jordan along to question her.

Jordan and Inman go in search of a missing Russian ballerina.

When Britain's top code and cypher breaker is forced to mingle with Communist players during a chess tournament, Inman goes along to keep an eye on him. Moxon, meanwhile, is playing a dangerous game of his own: the pawn being Jordan.

Craven find himself under suspicion of accepting a bribe. This marked the return of the series in an all new shot on film format with a mostly new cast and lots more action.

Haggerty's appointment to Special Branch immediately brings him into conflict with Craven - he believes that Craven is on the trail of a man who is already dead.

Craven finds the tables turned when he is accused of hounding a self-confessed fraud.

Haggerty and Craven target a team of vicious muggers.

The Special Branch team are assigned to protect the captain of a Polish passenger and cargo ship who believes he is going to be killed.

Special Branch joins forces with a bomb-disposal expert to stop a terrorist bombing campaign in the heart of London.

The body of a young girl is found floating in the Thames - is it murder, suicide or something worse?

A deranged man has taken a hostage and threatens to blow up a block of flats. Craven must act quickly to avert disaster.

British-born Hollywood star Sue Arden arrives in London to rehearse a play, accompanied by a tip-off from the F.B.I that she could be a target of a murder attempt. Craven, Haggerty and North are assigned to protect the actress, but the job and the murder threats are not all they appear to be…

Craven finds himself investigating a man accused of being a traitor, but has his doubts as to the truthfulness of the accusations.

Craven is puzzled as to why he has been asked to carry out twenty-four hour surveillance on a couple who are engaged to be married.

Craven and Haggerty are under the gun to find a kidnapped diplomat's daughter before she is killed.

The team is assigned to protect a visiting foreign diplomat.

Craven and Haggerty are assigned to investigate if a photographer is a threat to national security.

The team are on the trail of Rehfuss - a deadly assassin who has managed to get into the country.

Craven and Haggerty are hot on the trail of a traitor has broken out from prison.

An experimental weapon is stolen from a military research facility, but the thieves are unaware the weapon is unstable.

Tensions run high as Craven and Haggerty investigate two army officers.

Craven provides security for the debriefing of a captured KGB agent.

Craven and Haggerty investigate the broadcasting of compromising information about public figures on a pirate radio station.

Craven is appalled to find himself implicated in his ex-wife's terrorist activities.

Craven must unravel the connection between a recently-killed spy and an au pair.

Craven has to investigate a morally dubious but strategically important foreign VIP who has been robbed of a fortune in diamonds.

A German student revolutionary has been allowed into Britain under the strict condition that he does nothing political. Craven and Haggerty are made to ensure that he sticks to the terms of his deal.

Is Strand's erratic behaviour a result of the pressure he is under or is he playing a much more dangerous game?

Craven and Haggerty are working against the clock to find a gunman stalking the London streets.