Classic Who S9 • Serial 1 · (4 episodes)
Day of the Daleks
Freedom fighters from the 22nd Century attempt to thwart a new Dalek invasion of Earth, by going back in time to the late 20th century to assassinate Sir Reginald Styles, a delegate to the second World Peace Conference, whose actions their history blames for the subsequent Dalek conquest.
4 Episodes:
When someone tries to assassinate diplomat Sir Reginald Styles, UNIT investigate the possibility his attacker came from the future.
Jo uses the guerrillas' time machine to travel to the 22nd century where the Controller tricks her into telling the Daleks where she's come from.
The Doctor forces the guerrillas to take him to the 22nd century where he is soon captured by the Controller.
The guerrillas infiltrate the Daleks' base to rescue the Doctor and Jo and ask them to return to their own time and alter history before the 20th century is plunged into a Third World War.