The TARDIS takes its new passengers back to the dawn of history. There, the Doctor and his party are captured by a tribe who are trying to rediscover the secret of fire.
Did You Know?
The bones used in the Cave of Skulls scenes were obtained by designer Barry Newbery
from an abattoir. The smell they gave off under the hot studio lights was extremely unpleasant. See more
The shadow of a boom microphone can be seen moving across Susan shortly after she leaves the TARDIS. See more
[to himself about the TARDIS
It's still a police box! Why hasn't it changed? Dear, dear - how very disturbing!
Featured in Doctor Who: Origins