 Forward stated that the change in the final manuscript was made at the request of editor David J. Howe, who thought it would be better to link the story to a fan theory about Peri's relationship with her stepfather, though not based on her character as seen in the television serials.The Doctor, meanwhile, has been rescued by a giant crab called Scrounger, who was designed to fight in a war but is now surviving with others of his kind on a nearby island.Shortly after being taken there, the Doctor meets the only other humanoid around, Ranger, who is suffering from shell shock as a result of the war.