Igor
Igor, el ayudante del Dr. Glickenstein decide realizar su propio experimento, buscando ganar la feria de ciencia maligna, y de esa forma convertirse en un científico loco por derecho propio.
Tráiler
Reparto
John Cleese
Dr. Glickenstein (voice)
Jay Leno
King Malbert (voice)
Paul Vogt
Buzz Offmann (voice)
John Cusack
Igor (voice)
Suzy Eddie Izzard
Dr. Schadenfreude (voice)
James Lipton
Himself
Christian Slater
Dr. Schadenfreude's Igor (voice)
Jess Harnell
Announcer / Royal Guard #2 (voice)
Frank Welker
Animals' vocal effects (voice) (uncredited)
Myleene Klass
Dr. Holzwurm (voice)
Steve Buscemi
Scamper (voice)
Sean Hayes
Brain (voice)
Jennifer Coolidge
Jaclyn / Heidi (voice)
Molly Shannon
Eva (voice)
Arsenio Hall
Carl Cristall (voice)