Worse still, it seems that the Doctor isn’t the only renegade Time Lord on the trail of this deadly and mysterious Worm…
NOTE: This story continues in The Oseidon Adventure.
Written By: Alan Barnes
Directed By: Ken Bentley
Tom Baker (The Doctor), Louise Jameson (Leela), Geoffrey Beevers (The Master),Michael Cochrane (Colonel Spindleton), Rachael Stirling (Demesne Furze), John Banks (Carswell/Mercenary), Becci Gemmell (Julie), Mark Field (John)