Un genio con dos cerebros: Reparto
Steve Martin
Dr. Michael Hfuhruhurr
Kathleen Turner
Dolores Benedict
David Warner
Dr. Alfred Necessiter
Paul Benedict
Butler
Richard Brestoff
Dr. Pasteur
James Cromwell
Realtor
George Furth
Timon
Peter Hobbs
Dr. Brandon
Earl Boen
Dr. Felix Conrad
Bernie Hern
Gun Seller
Francis X. McCarthy
Olsen
William Traylor
Inspector
Randi Brooks
Fran
Bernard Behrens
James Gladstone
Natividad Vacío
Ramon
David Byrd
Desk Clerk
Adrian Ricard
Nurse in Room
Sparky Marcus
Bellboy
Perla Walter
Housekeeper
Mya Stark
Little Girl
Don McLeod
Dr. Schlermie Beckerman / Gorilla
Peter Elbling
Morgue Attendant
Kate Sarchet
Hooker #2
Wendy Sherman
Hooker #3
Tom Spratley
Minister
Estelle Reiner
Tourist in Elevator
Jeffrey Combs
Dr. Jones
Jenny Gago
Nurse #1
Haunani Minn
Nurse Breen
Stepfanie Kramer
Beautiful Girl Hit by Car
George Fisher
Patrol Car Officer
Merv Griffin
The Elevator Killer
Bob Harks
Lecture Guest (uncredited)
Sissy Spacek
Anne Uumellmahaye (uncredited) (voice)