Mel Brooks

Dr. Richard H. Thorndyke

Madeline Kahn

Victoria Brisbane

Cloris Leachman

Nurse Charlotte Diesel

Harvey Korman

Dr. Charles Montague

Ron Carey

Brophy

Howard Morris

Professor Lilloman

Dick Van Patten

Dr. Philip Wentworth

Jack Riley

The Desk Clerk

Charlie Callas

Cocker Spaniel

Ron Clark

Zachary Cartwright III

Rudy De Luca

'Braces' - Killer

Barry Levinson

Dennis - Bellboy

Lee Delano

Norton

Billy Sands

Customer

Richard Stahl

Dr. Baxter

Robin Menken

Cocktail Waitress

Darrell Zwerling

Dr. Eckhardt

Murphy Dunne

Piano Player

Robert Ridgely

Flasher

Arnold Soboloff

Dr. Colburn

Eddie Ryder

Doctor at Convention

Sandy Helberg

Airport Attendant

Fred Franklyn

Man from Cincinnati in Piano Bar

Bernie Kuby

Dr. Wilson

Beatrice Colen

Maid in Hotel

Hunter von Leer

Policeman at Airport

John Dennis

Orderly

Frank Campanella

Bartender

Joe Bellan

Male Attendant

David Armstrong

Club Patron (uncredited)

Charles Cirillo

Commuter at Airport (uncredited)

Laura Gile

Club Patron (uncredited)

Allan Graf

Man Going Through Metal Detector (uncredited)

Robert Lussier

Thorndyke's Father in Flashback (uncredited)

Norman Stevans

Lecture Guest (uncredited)