 When he saw that it was Bob smoking inside the suit, he told him that in the future, whenever the script called for the suit to issue smoke, that Bob should be the one to make it happen.The robot costume had been created by art director and production designer Robert Kinoshita, who had been the designer of Robby the Robot from the 1956 film "Forbidden Planet".Though the regularly used robot required someone to be inside, there were some shots filmed during the third season of the series that used an unoccupied "stunt robot" in certain long shots.