Paul Newman
(Prof. Michael Armstrong),
Julie Andrews
(Dr. Sarah Sherman),
Don Ames
(Theatre Patron),
Chris Anders
(Blond Aide to Mr. Gerhard),
Carolyn Conwell
(Farmer's Wife),
Ludwig Donath
(Professor Gustav Lindt),
Hansjörg Felmy
(Heinrich Gerhard),
Gisela Fischer
(Dr. Koska),
Gloria Govrin
(Fräulein Mann),
Arthur Gould-Porter
(Freddy - the Bookseller),
Lila Kedrova
(Countess Kuchinska),
Wolfgang Kieling
(Hermann Gromek),
Mort Mills
(Farmer),
David Opatoshu
(Mr. Jacobi),
Günter Strack
(Professor Karl Manfred),
Tamara Toumanova
(Ballerina),
Elizabeth Alexander
(Bus Passenger),
Elisabeth Alexander
(Bus Passenger)