In 17th century England, the Doctor and itinerant thespian Richard Mace uncover a plot by a crew of criminal Terileptils to wipe out humanity.
Peter Davison
Matthew Waterhouse
Sarah Sutton
Janet Fielding
Michael Robbins
Michael Melia
Peter van Dissel
James Charlton
Neil West
Eric Dodson
John Savident
Anthony Calf
John Baker
Valerie Fyfer
Richard Hampton
David Summer
Michael Leader
Jeff Wayne