Credits
Cast
Walt Disney
Mickey Mouse (voice) (uncredited)
Pinto Colvig
Pluto (voice) (uncredited)
Billy Bletcher
Dr. XXX (voice) (uncredited)
Directing
David Hand
Director, Director of Photography, Writer
Production
Walt Disney
Producer
Joseph M. Schenck
Producer
Sound
Bert Lewis
Original Music Composer
Visual Effects
Art Babbitt
Animation
Ben Sharpsteen
Animation
Les Clark
Animation
Jack King
Animation
Johnny Cannon
Animation
Tom Palmer
Animation
Hardie Gramatky
Animation