1 January 1972
Nicholas Courtney (Brigadier Lethbridge-Stewart) [1-2, 4], Aubrey Woods (Controller), Richard Franklin (Captain Yates) [1-2, 4], John Levene (Sergeant Benton) [1-2, 4], Anna Barry (Anat), Jimmy Winston (Shura) [1-2, 4], Scott Fredericks (Boaz), Wilfred Carter (Sir Reginald Styles) [1, 4], Jean McFarlane (Miss Paget) [1, 4], Deborah Brayshaw (Girl Technician) [1, 3], Gypsie Kemp (U.N.I.T. Radio Operator) [1-2], Tim Condren (Guerilla) , Rick Lester, Maurice Bush, David Joyce [2-4], Frank Menzies [2-4], Bruce Wells [2-4], Geoff Todd [2-4] (Ogrons), John Scott Martin, Rick Newby, Murphy Grumbar (Daleks), Oliver Gilbert, Peter Messaline (Dalek Voices), Valentine Palmer (Monia) [3-4], Peter Hill (Manager) , Andrew Carr (Senior Guard) [3-4], George Raistrick (Guard at Work Centre) , Alex MacIntosh (Television Reporter) .
|Written by||Louis Marks|
|Directed by||Paul Bernard|
|Produced by||Barry Letts|
World peace hangs in the balance. Sir Reginald Styles, a high-ranking diplomat is the only person that stands between mankind and a third and final World War. But a mysterious and savage guerrilla force from the 22nd Century believe Styles is the agent that shaped their terrifying future and therefore must die.
The Doctor and Jo find themselves flung into the guerrillas’ world, a brutal dictatorship policed by the merciless and ape-like Ogrons. The Daleks have invaded Earth, enslaved the population and face certain triumph unless The Doctor betrays all he believes in and condones the cold-blooded murder of Styles in an attempt to change the course of history irrevocably.
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 number who were impregnated with the Human Factor in the events seen in The Evil of the Daleks and then turned their attention to conquering Earth by means of time travel. This scene was actually recorded but had to be cut at the ing stage for timing reasons.