With both of them barricaded into the cottage, the Doctor reveals more about the fiendish powers of the extra-terrestrial swarm to Mike Yates.

Part of a five-story adventure written by Paul Magrs.

Starring Tom Baker as the Fourth Doctor, Richard Franklin as Mike Yates, Susan Jameson as Mrs Wibbsey and Daniel Hill as Percy Noggins.

Producer: Kate Thomas

Made by BBC Audio. Show less