Walter Pidgeon Dr. Edward Morbius Anne Francis Altaira Morbius Leslie Nielsen Commander John J. Adams Warren Stevens Lt. 'Doc' Ostrow Jack Kelly Lt. Jerry Farman Marvin Miller Voice of Robby the Robot Earl Holliman Cookie Richard Anderson Chief Engineer Quinn George Wallace Bosun Robert Dix Crewman Grey James Drury Crewman Strong Peter Miller Crewman Moran Morgan Jones Crewman Nichols James Best Crewman (uncredited) William Boyett Crewman (uncredited) Les Tremayne Narrator (uncredited) (voice) Frankie Darro Robby the Robot (interior) (uncredited) Robby the Robot Robby the Robot Walter Pidgeon Dr. Edward Morbius Anne Francis Altaira Morbius Leslie Nielsen Commander John J. Adams Warren Stevens Lt. 'Doc' Ostrow Jack Kelly Lt. Jerry Farman Marvin Miller Voice of Robby the Robot Earl Holliman Cookie Richard Anderson Chief Engineer Quinn George Wallace Bosun Robert Dix Crewman Grey James Drury Crewman Strong Peter Miller Crewman Moran Morgan Jones Crewman Nichols James Best Crewman (uncredited) William Boyett Crewman (uncredited) Les Tremayne Narrator (uncredited) (voice) Frankie Darro Robby the Robot (interior) (uncredited) Robby the Robot Robby the Robot Walter Pidgeon Dr. Edward Morbius Anne Francis Altaira Morbius Leslie Nielsen Commander John J. Adams Warren Stevens Lt. 'Doc' Ostrow Jack Kelly Lt. Jerry Farman Marvin Miller Voice of Robby the Robot Earl Holliman Cookie Richard Anderson Chief Engineer Quinn George Wallace Bosun Robert Dix Crewman Grey James Drury Crewman Strong Peter Miller Crewman Moran Morgan Jones Crewman Nichols James Best Crewman (uncredited) William Boyett Crewman (uncredited) Les Tremayne Narrator (uncredited) (voice) Frankie Darro Robby the Robot (interior) (uncredited) Robby the Robot Robby the Robot