Carmen Culver's television script added so many new characters, and changed so many sequences from the 1834 novel by Edward George Bulwer-Lytton that her version merited a paperback novelization of its own, written by David Wind.

Stephen Greif (Sporus) and Brian Croucher (Melior) both played Space Commander Travis in Blake's 7 (1978), during its first and second seasons respectively.

Brian Croucher's voice was dubbed by an uncredited American actor.

Italian actresses Marilù Tolo and Francesca Romana Coluzzi were dubbed.

It was originally announced that Anthony Quinn would be starring.