The Doctor and Nasreen Chaudry go deep underground and find an ancient society that has been disturbed by the drilling. They are gassed and taken prisoner just as Amy manages to free herself. The military commander of the underground reptilians, Restac, is convinced that the "apes' - their term for humans - are an invading force. Calmer heads prevail and the Doctor manages to negotiate a truce pending the transfer of prisoners which he, and some of the more pacifist members of the reptilians, hopes will lead to a lasting peace. The only problem is that Alaya, the reptile prisoner has been killed and Restac is ready to go to war. Written by
Did You Know?
This is the first appearance of the Silurians having a long tongue that could inject venom. See more
According to The Doctor in "Flesh and Stone", Amy can remember the clerics and the Weeping Angels who fall into the space/time crack because she's a time traveler. Yet in this episode she forgets Rory after he's absorbed by the crack, which is explained as Rory was from Amy's personal life and the Clerics and Angels weren't. The Doctor explained this as he tried to keep Rory in Amy's mind, trying to help her remember him. See more
[Elliot has just been awakened from artificial slumber
But where are we?
Well, I've got to be honest with you, son. We're in the centre of the Earth, and there are lizard men.
Doctor Who Theme
Written by Ron Grainer
Arranged by Murray Gold
Performed by BBC National Orchestra of Wales See more