Montgomery Clift
Sigmund Freud
Susannah York
Cecily Koertner
Larry Parks
Dr. Joseph Breuer
Susan Kohner
Martha Freud
Eileen Herlie
Frau Ida Koertner
Fernand Ledoux
Dr. Charcot
David McCallum
Carl von Schlossen
Rosalie Crutchley
Frau Amalia Freud
David Kossoff
Jacob Freud
Joseph Fürst
Herr Jacob Koertner
Alexander Mango
Babinsky
Leonard Sachs
Brouhardier
Eric Portman
Dr. Theodore Meynert
John Huston
Narrator (voice) (uncredited)
Ol Abdou
(uncredited)
Manfred Andrae
Student Doctor (uncredited)
Victor Beaumont
Dr. Guber (uncredited)
Allan Cuthbertson
Wilkie (uncredited)
Eduard Linkers
Dr. Torsch (uncredited)
Ferdy Mayne
Questioner at Final Lecture (uncredited)
Elisabeth Neumann-Viertel
Frau Bernays (uncredited)
Maria Perschy
Magda (uncredited)
Moira Redmond
Nora Wimmer (uncredited)
Charles Regnier
(uncredited)
Stefan Schnabel
Chairman of Medical Profession in Vienna (uncredited)