Novelization of 1 Season 3 and 2 Season 4 episodes:
1) Dead Reckoning, by Philip Loraine: A spy is being extradited to Britain in secret but the info is leaked.
2) Mixed Doubles, by Brian Clemens: Bodie and Doyle get special training to protect a foreigner even as two others are trained to kill him.
3) Need To Know, by Brian Clemens: the arrest of a friend of Cowley casts a bad light on the CI5 head.