The Time Lord concludes his tale of encountering the deadly insects in medieval England. Stars Tom Baker and Richard Franklin.
With the Doctor feeling increasingly disorientated, the alien swarm begin communications...
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, Claire Corbett as the Nun, Suzie Riddell as the Sister and Rula Lenska as the Swarm.
Producer: Kate Thomas
Made by BBC Audio.