Trama

Challenger, Roxton, and Veronica come upon an old friend of Challenger's, who resembles the sadistic creator Dr. Moreau. Elsewhere, Summerlee, Malone, and Marguerite meet an elderly woman who has a radio headset.

An old friend of Challenger's is discovered to not just be living on the plateau with his thought to have been deceased daughter, but he is also experimenting with human/ape hybrids. Veronica is captured and chosen to be part of his main experimental tests.

The discovery that one of Challenger's old friends from London is living on the plateau with his daughter causes Challenger some concern considering he was at the girl's funeral fifteen years ago. Furthermore, Veronica's disappearance coupled with encounters with armed, intelligent apemen, lead Roxton and Challenger to uncover the secret genetic experimentation being carried out by Dr. Hargrove. Meanwhile, a faint image in a photograph helps Summerlee, Marguerite and Malone locate an elderly woman, who claims to be an exiled fairy queen, who may have access to a radio transmitter - however she is only willing to divulge it's location in exchange for help in breaking her curse - all she requires is a few drops of blood from a virgin.