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.
Did You Know?
This episode was watched by 10.4 million viewers on its original transmission. See more
The operation of the resistance fighters' time modules is inconsistent: in the first episode, the operator is not affected by the time field, while the time-traveller - even at a distance from the machine - is transported into the future. When Jo Grant uses the same module, however, she and the machine are both transported into the future, whereas the characters standing outside the vortex (including the future resistance fighters) are unaffected. See more