|Publication Date||11 July 1985|
Eminent scientist Emil Keller has developed a revolutionary new process for the treatment of hardened criminals. His invention, the Keller Machine, is being heralded as a major scientific breakthrough.
But Professor Keller is in truth The Master and the Keller Machine is much more than a mere machine.
- The Sentence
- The Terror
- The Inferno
- The Listener
- The Pistol
- The Dragon
- The Hostage
- The Mutiny
- The Test
- The Mind Parasite
- The Escape
- The Attack
- The Reunedition
- The Mind of Evil
- The Farewell
DEVIATIONS FROM THE TELEVISED STORY
- The Doctor is aware of the mind parasite as an urban legend across the universe.
- The characters’ fears are explored in greater detail.
- Some of the character names used appeared in scripts but were not used on screen: The Governor’s full name is given as Victor Camford(the television version merely calls him”Victor”) and the two warders in the condemned cell are called Johnson and Samuels.
- Back story is introduced for some of the characters: Barnham killed a security guard who caught him robbing a safe and a fellow prisoner before attacking a warder, while Harry Mailer is the leader of a London gang who was jailed when one of a string of suspected murders was committed in public.
- Green is not identified as one of the fatalities in the prison takeover: He is last mentioned helping to quell the earlier escape attempt, making his fate unclear.
- The Brigadier is mentioned as dreaming of his time as a subaltern with Doris, something not established until”Planet of the Spiders“.
- Mailer accidentally kills a fellow prisoner when Jo jumps him during his escape attempt. The physical comedy of the Doctor glaring at Mailer when he is about to club him is removed.
- The Master introduces himself to Mailer; in the televised version, Mailer only knows him as Keller. Jo addresses The Master directly as “Master” on seeing him again, something she never does on screen.
- There are a few extra lines of dialogue and thoughts to cover minor plot holes: Summers worries about Barnham being left behind in the infirmary during the attempted break-out and the Brigadier reflects that he cannot involve the army in liberating Stangmoor Prison because for political reasons (presumably the secrecy surrounding the Thunderbolt).