Transmitted originally: 1 January 1972 to 22 January 1972.
When the guerrillas return there, the Doctor goes with them. he learns that the Earth of this period is ruled by the Daleks, with the help of the Ogrons and human collaborators, whose leader is known as the Controller. Jo and the Doctor are both taken prisoner at the Dalek base. The guerrillas rescue them and explain they were attempting to kill Styles because he caused an explosion at the peace conference, starting a series of wars that left humanity vunerable to Dalek conquest - a history they wish to change. The Doctor realises that the explosion was actually caused by Shura in a misguided attempt to complete his mission. Returning to the 20th Century with Jo, he has Styles' house evacuated. Daleks and Ogrons arrive in pusuit, but are destroyed when Shura detonates the bomb.
CAST:
The Doctor (Jon Pertwee), Jo Grant (Katy Manning), Brigadier Lethbridge-Stewart (Nicholas Courtney), Controller (Aubrey Woods), Captain Yates (Richard Franklin), Sergeant Benton (John Levene), Anat (Anna Barry), Shura (Jimmy Winston), Boaz (Scott Fredericks), Sir Reginald Styles (Wilfrid Carter), Miss Paget (Jean McFarlane), Girl Technician (Deborah Brayshaw), U.N.I.T. Radio Operator (Gypsie Kemp), Guerilla (Tim Condren), Ogrons (Rick Lester, Maurice Bush, David Joyce, Frank Menzies, Bruce Wells, Geoffrey Todd), Daleks (John Scott Martin, Ricky Newby, Murphy Grumbar), Dalek Voices (Oliver Gilbert, Peter Messaline), Monia (Valentine Palmer), Manager (Peter Hill), Senior Guard (Andrew Carr), Guard at Work Centre (George Raistrick), Television Reporter (Alex MacIntosh)/
FACTS:
Only three Dalek props were used during the filming of the story.
BBC television news reporter Alex Macintosh appears as himself in Episode Four.
Episode Four was originally to have featured a confrontation between the Doctor and the Daleks, in which the Daleks explain how they destroyed those of their race who were impregnated by the human factor in the events seen in 'The Evil of the Daleks' and then turned their attention to conquering Earth using time travel. This scene was actually recored, but had to be cut at the editing stage for timing reasons.
OTHER FORMATS:
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