When restoring the series for DVD release, Network discovered several cut sequences from this edition, all relating to the Auto Cam garage - presumably a real-life company of the same name had objected to its use following first broadcast. They were able to successfully track down a complete copy of the episode from Germany, and reinstate the excised material.
Kate O'Mara successfully screentested for the role of Annabelle Hurst, and was then offered it by producer Monty Berman. According to her memoirs, however, the American backers refused to cast her after describing her as too "exotic".