Under threat of being placed in a red file, Callan is coerced into helping the Section hand over an ex-SS officer, Strauss, to the Israelis.

Callan must stop an old friend, Clarke, from going back to Africa, where he was training mercenaries, else Hunter will have Clarke killed.

Two CIA agents request the help of Hunter's Section in killing a Chinese agent, who has been trading in nuclear secrets. But his real mission in England is to kill Hunter.

Callan is lured into going to Berlin, where Hunter wants to use him as a sacrificial lamb to facilitate the planting of a British mole.

When somebody beats Lonely up, and Callan finds out who it was he turns the table on Hunter.

Callan apparently turns renegade. A ruse to trap the head of a ‘pipeline' for smuggling foreign agents and defectors out of the country.

Callan must retrieve a microfilm from a spying medium.

Calln must find everything out about the past of an influential politician.

Callan and Meres must catch the controller of a ring of spies before he can leave the country with the information the ring has gathered.

Callan and Meres must secure the safe of a ship that was sunk during World War Two. It contains a list of Third Reich collaborateurs and puppets. A survivor of the ship tries to stop them.

Callan must stop fashist agitators from killing the Chinese Ambassador.

Callan is dead. Or so the KGB would have you think.

Lonely is used as bait to retrieve Callan from the KGB.

Callan has become the new Hunter. And his first job is to retrieve a list of British undercover agents.

Callan orders Cross to terrorise an innocent Russian family for political reasons.

Callan looses his position as Hunter when he goes after the assassin who killed Cross.

The old Hunter returns and Callan tries to get away.

Callan tries to quit the Section when a girl he is seeing takes a dislike to his job.

Lonely becomes the unlucky witness to a mob hit.

Callan and Lonley break into a courier's house to find out how he's operating.

Callan substitutes himself for an assassin in order to prevent an assassination.

Callan debriefs a top enemy defector.

Richmond, a top enemy defector, reveals his true purpose.

Callan tracks down Richmond who is trying to leave Britain.

A parlamental candidate recieves a death threat.