After discussing their pupil Susan, two teachers follow her to a junkyard. They meet her grandfather, the Doctor, and force their way inside a police box. Show more

The Cave of Skulls: The TARDIS travels back to Stone Age times, where the crew make the mistake of venturing outside. Show more

The Forest of Fear: The Doctor and crew leave the TARDIS to explore their new surroundings, but are captured, thrown in a cave and threatened with death. Show more

The Firemaker: The Doctor decides that the only way to escape is to show the Stone Age cave dwellers how to make fire. Show more