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E1 Red Knight, White Knight
The Section's new Hunter has Callan pulled from the field.
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E2 The Most Promising Girl of Her Year
Callan must prove that a young biochemist is not giving information to the East.
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E3 You're Under Starter's Orders
Callan apparently turns renegade. A ruse to trap the head of a ‘pipeline' for smuggling foreign agents and defectors out of the country.
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E4 Little Bits and Pieces of Love
Callan must use the wife of a rocket scientist as bait to lure the same scientist to Britain.
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E5 Let's Kill Everybody
A freelance German mercenary organisation who specialise in eliminating foreign security sections have their sights set on the Section.
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E6 Heir Apparent
After Hunter's death Meres and Calln must fetch the new Hunter from East Germany.
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E7 Land of Light and Peace
Callan must retrieve a microfilm from a spying medium.
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E8 Blackmailers Should Be Discouraged
Calln must find everything out about the past of an influential politician.
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E9 Death of a Friend
The French O.A.S. carry an internal war into England. Callan and Meres must sort out the mess.
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E10 Jack-on-Top
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.
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E11 Once a Big Man, Always a Big Man
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.
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E12 Running Dog
Callan must stop fashist agitators from killing the Chinese Ambassador.
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E13 The Worst Soldier I Ever Saw
Security wants a retired brigadier of the British army to be stopped from accepting a job offer from a sultan, deadly force is requested.
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E14 Nice People Die at Home
Callan brings confusion into a Russian spy network.
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E15 Death of a Hunter
Callan in brainwashed into believing that Hunter is the leak in the Section and that he has also killed Lonely and framed Callan for murder. In his drugged state Callan kills Hunter and is shot down by Meres.