A psychiatrist with intense acrophobia (fear of heights) goes to work for a mental institution run by doctors who appear to be crazier than their patients, and have secrets that they are willing to commit murder to keep.

Mel Brooksas Dr. Richard H. Thorndyke
Madeline Kahnas Victoria Brisbane
Cloris Leachmanas Nurse Charlotte Diesel
Harvey Kormanas Dr. Charles Montague
Ron Careyas Brophy
Howard Morrisas Professor Lilloman
Dick Van Pattenas Dr. Philip Wentworth
Jack Rileyas The Desk Clerk
Charlie Callasas Cocker Spaniel