episode is unique in that it was intentionally crafted to feature Martin Landau alone. Barbara Bain, Catherine Schell and Tony Anholt, though receiving on-screen credit, would appear only in library footage seen during Koenig's mind-probe; Bain would also be heard narrating Helena's customary status report at the start of the episode. At the time of filming, Bain, Schell, Anholt and Nick Tate were off filming the opposing double-up episode "Dorzak". Entitled "Devil's Moon" until post-production, the story would undergo other adjustments: (1) The Alphans were to have received a distress signal from Ellna; this was the reason Koenig was flying with a member of the medical rescue team; (2) Significant dialogue between Elizia and Crael was cut. It was inferred that Crael had served his sentence, but remained out of a sense of duty to act as defence counsel for the inmates. More dialogue about the rights of the imprisoned was also excised; (3) A sequence in the security ward was removed where, faced with Fraser's threat of attack, the Entrans view Koenig's knowledge of Earth warfare. Library footage would have depicted the history of war from marching Roman legions to the Hiroshima atomic bomb The supporting cast was to include Bill Fraser, Doctor Ben Vincent and Sandra Benes. While John Hug would appear as Fraser, Jeffery Kissoon was no longer available and his role was given to newcomer Sam Dastor, playing Doctor Ed Spencer. Sahn was also replaced, as Zienia Merton was committed to a lead part in the Norwegian film Kosmetikkrevolusjonen. She had intended staying long enough to film this episode, excited that her character would leave the confines of Moonbase. However, delays in the Space: 1999 shooting schedule further pushed back the starting date and Merton was forced to depart for Norway. The role would be given to American actress Alibe Parsons. Her character, also called Alibe, is a communications officer and would be given all of the Sandra Benes scenes and dialogue for the rest of the series. Novelisation The episode was adapted in the fifth Year Two Space: 1999 novel The Time Fighters by Michael Butterworth published in 1977. Few changes were made to this narrative when the author chose to blend this story with "The Séance Spectre". Koenig and Maine were scouting ahead of the Moon after its emergence from a space warp. As the ship went down, they observed 'Sandor' and his mutineers