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
Robby the Robot original construction. It featured a highly simplified and rather old-fashioned cylindrical "oil can" robot head with stylised 'eyes' (that were illuminated and movable) and a circular 'mouth'; this was enclosed under the distinctively-shaped conical plexiglass dome, but this head's front grille also did not have the blue neon tubes and lacked the rotating external 'ear' pieces seen in "Forbidden Planet". It is not known whether this internal "oil-can'" head was original, but its rather rudimentary design and appearance is clearly not of same exacting MGM standards that are evident in all other "Forbidden Planet" props, and suggests it may have