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 gain access to the ship. During the confusion of the attack it is revealed that the Science Officer is Doctor Prospero's wife Gloria, who is then taken by the monster, as its tentacles attack the rest of the ship. The story continues with the attack unfolding again, but this time Gloria isn't kidnapped by the monster, and Ariel the robot is able to attack the monster to make it retreat. After the attack, more is revealed about Doctor Prospero and Gloria's past. Captain Tempest puts Gloria under ship arrest for her crimes against her husband. She forms a quick alliance