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
Return to the Forbidden Planet flying through the storm. During the confusion, the Science Officer escapes the ship via shuttle craft. Their spaceship is drawn mysteriously to the planet D'Illyria where the crew meet mad scientist Doctor Prospero, who has been marooned on the planet since his wife and science partner Gloria sent him and their daughter Miranda into space. Doctor Prospero offers to help repair the broken starship and he, his daughter, and their robot Ariel come aboard. The ship's cook, Cookie, is instantly taken by Miranda's beauty and falls in love with her, a love he thinks she returns. In fact she has