Patrick Troughton stars as the Doctor in the soundtrack of this classic TV story from 1968, in which he finds the humanoid Gonds enslaved by the monstrous, crystalline Krotons.

Along with his companions, Jamie and Zoe, the Doctor befriends the Gonds and enters the lair of their enemies. Can he halt the years of tyrrany and also escape with his life?

Written by Robert Holmes. Linking narration provided by a member of the original cast.