Christopher Hutton
Christopher William Clayton Hutton (1893–1965) a soldier, airman, journalist and inventor, was recruited as an intelligence officer to work for MI9, a branch of the British Military Intelligence, during the Second World War. Known as 'Clutty' to his friends, he was engaged towards the end of 1939 by the War Office to work under Major (later Brigadier) Norman Crockatt, in order to set up and run operations to create and distribute escape and evasion aids for Allied servicemen. Hutton's small team identified suitable manufacturers, ensured supplies and devised methods by which the concealed aids could be sent to prisoner of war camps.
Chris Skelton
During the finale it is revealed that, in reality, Skelton was dead. On 14 February 1975, whilst serving as a uniformed constable, his Sergeant told him to "do as he is told", which was for Chris to move out into the open at the blow of his Sergeant's whistle, resulting in him being gunned down and killed. Chris ponders on how he acted as a dogsbody for the Sergeant and did absolutely whatever he asked, just like his relationship with DCI Hunt, which he changes after standing up to Hunt in series three, episode seven.
He reunites with Shaz when she kisses him before crossing over to the other side, telling him she loves him "forever and a day," to which he responds: "Fab."