Robot (Lost in Space) arms. The Robot was performed by Bob May in a prop costume built by Bob Stewart. The voice was primarily dubbed by Dick Tufeld, who was also the series' narrator, and Jorge Arvizu for the Spanish dubbing. The Robot was designed by Robert Kinoshita, who also designed "Forbidden Planet"'s Robby the Robot. Robby appears in Lost in Space episode #20 "War of the Robots" and in episode #60 "Condemned of Space". The Robot did not appear in the unaired pilot episode, but was added to the series once it had been greenlit. Initially, the bellows-covered legs were articulated, and were
The Mysterious Planet robot costume and physically play the role, but it was realised that the costume would not fit Brierley's 6'4" frame. Therefore, a special effects assistant, Paul McGuinness, who helped design the costume, was called in to physically play Drathro, while Brierley spoke his lines from off-camera. Dominic Glynn was hired to score the incidental music for "The Mysterious Planet", then John Nathan-Turner offered him the chance to rearrange the opening title music. His new score for the opening theme was the shortest-lived, lasting for this season alone (not counting the unused 1973 version by Delia Derbyshire and Paddy Kingsland). The