Tuesday Weld
— Libby Bushmill / Libby Smith
Richard Beymer
— Mike Pulaski
Terry-Thomas
— Professor Bruce Patterson
Celeste Holm
— Helen Bushmill
Francesca Bellini
— Gladys Schmidlapp
Howard McNear
— Dr. Dylan Bowman
Ann Del Guercio
— Liz Turner
Roxanne Arlen
— Mrs. Roberts
Alice Reinheart
— Mrs. Bowman
Jessica Dachshund
— Jessica
Stephen Bekassy
— Paul
Danielle Aubry
— French Stewardess
Joe Brooks
— Driver
George Bruggeman
— Paul Revere
Jerry Fujikawa
— Frank, Gardener
Margo Moore
— Mabel Smith
Stephen Chase
— District Attorney
Dick Whittinghill
— Radio DJ (Voice)
Roy Wright
— Big Fireman
Paul Maxey
— Big Man in Jaguar in Dream
Robert Karnes
— Police Officer
Larry Thor
— Police Officer in Sheriff's Office
Carol Christensen
— Student
Christopher Bowler
— Student