The Doctor is caught up in events at Stangmoor Prison, where Professor Keller’s new machine is said to be able to remove all evil impulses from the minds of the prisoners.
Story Order
- Story 56 from Doctor Who
- Story 2 of 5 from Season 8
Episodes
Saturday
30th January 1971
5:15PM
BBC 1 (24 mins)
The Doctor and Jo watch a demonstration of the Keller Machine which can extract evil impulses from criminals.
Saturday
6th February 1971
5:15PM
BBC 1 (24 mins)
A full scale riot takes place at the Prison and Jo is taken hostage.
Saturday
13th February 1971
5:15PM
BBC 1 (24 mins)
The Master is behind the Keller Machine and uses it to recruit the rioting inmates at Stangmoor Prison.
Saturday
20th February 1971
5:15PM
BBC 1 (24 mins)
The mind parasite within the Keller Machine becomes too powerful for the Master to control.
Saturday
27th February 1971
5:15PM
BBC 1 (23 mins)
The Master forms an uneasy alliance with the Doctor so that between them they can subdue the Keller Machine.
Saturday
6th March 1971
5:15PM
BBC 1 (24 mins)
The Keller Machine breaks free of the Doctor's restraining device. The Doctor turns it against the Master.
Credits
- Dr. WhoJon Pertwee
- Brigadier Lethbridge-StewartNicholas Courtney
- Jo GrantKaty Manning
- Mike YatesRichard Franklin
- Captain Chin LeePik-Sen Lim
- Prison GovernorRaymond Westwell
- Dr. SummersMichael Sheard
- Professor KetteringSimon Lack
- BarnhamNeil McCarthy
- Corporal BellFernanda Marlowe
- LinwoodClive Scott
- Chief Prison Officer PowersRoy Purcell
- Senior Prison Officer GreenEric Mason
- Prison OfficerBill Matthews
- Prison OfficerBarry Wade
- Prison OfficerDave Carter
- Prison OfficerMartin Gordon
- The MasterRoger Delgado
- Sergeant BentonJohn Levene
- MailerWilliam Marlowe
- VosperHaydn Jones
- Fu PengKristopher Kum
- Senator AlcottTommy Duggan
- CharlieDavid Calderisi
- Major CosworthPatrick Godfrey
- FullerJohnny Barrs
- Main Gates PrisonerLaurie Ayres