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.
Quest roles:
Richard Franklin(Mike Yates), John Scott Martin(Dalek Operator), Nicholas Courtney(Brig. Lethbridge-Stewart), Murphy Grumbar(Dalek Operator), John Levene(Sergeant Benton), Aubrey Woods(Controller), Anna Barry(Anat), Jimmy Winston(Shura), Scott Fredericks(Boaz), Rick Lester(Third Ogron), Maurice Bush(Ogron), Ricky Newby(Dalek), David Joyce(Ogron), Frank Menzies(Ogron), Bruce Wells(Ogron), Geoffrey Todd(Ogron), Sarah Kemp(UNIT Radio Operator), Oliver Gilbert(Dalek Voices (voice))