Season 4

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.