Doctor Doctor Who Guide
Last updated 09 January 2020


Episode One

Episode One

Series Episode Number: 283

World Premiere: Sat 30 Jan 1971 - 5:15pm BST [BBC One] (United Kingdom)
First Broadcast: Fri 7 Nov 1975 - 6:30pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 39 seconds

6.10 Million (UK)


Chart Position: 61 () (UK)

Recorded on Sat 21 Nov 1970 in TC3 / TC6
Archive State: 16mm t/r



At Stangmoor Prison, the Doctor and Jo watch a demonstration of the Keller Machine which can extract evil impulses from criminals. But the experiment goes wrong and a man dies.


Characters hide uncredited
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
(extra)B G Heath (uncredited)
(extra)Billy Horrigan (uncredited)
(extra)Bob Blaine (uncredited)
(extra)Bombadier A Green (uncredited)
(extra)Bombadier Barry Hall (uncredited)
(extra)Bombadier J Lamb (uncredited)
(extra)Bombadier R Thompson (uncredited)
(extra)Derek Chafer (uncredited)
(extra)Francis Williams (uncredited)
(extra)Frank Beamott (uncredited)
(extra)Gary Gregory (uncredited)
(extra)Gunner K Davenport (uncredited)
(extra)Ian Elliott (uncredited)
(extra)Johnny Clump (uncredited)
(extra)Lance Bomb H Berkley (uncredited)
(extra)Laurie Ayres (uncredited)
(extra)Les Clark (uncredited)
(extra)Max Diamond (uncredited)
(extra)Michael Carter (uncredited)
(extra)Pat Donahue (uncredited)
(extra)Peter Roy (uncredited)
(extra)Ricky Lancing (uncredited)
(extra)Robert Bald (uncredited)
(extra)Sgt Herridage (uncredited)
(extra)Sgt D Tallot (uncredited)
ChauffeurMichael Ely (uncredited)
Cheng Teik's corpseFrancis Botsoni (uncredited)
GuardLeslie Weekes (uncredited)
Medical OfficerCharles Finch (uncredited)
Medical OfficerCharles Pickess (uncredited)
PhotographerCharles Marriott (uncredited)
Prison OfficerTony Jenkins (uncredited)
PrisonerAlistair McFarlane (uncredited)
PrisonerCy Town (uncredited)
PrisonerDennis Balcombe (uncredited)
PrisonerDesmond Verini (uncredited)
PrisonerGeorge Ballantine (uncredited)
PrisonerLeonard Kingston (uncredited)
PrisonerNed Hood (uncredited)
PrisonerPaul Blomley (uncredited)
PrisonerPhilip Webb (uncredited)
Student at PrisonMaureen Race (uncredited)
UNIT SoldierNick Hobbs (uncredited)
UNIT SoldierStuart Fell (uncredited)