Keira Knightley as Sabina Spielrein

Viggo Mortensen as Sigmund Freud

Michael Fassbender as Carl Jung

Sarah Gadon as Emma Jung

Vincent Cassel as Otto Gross

André Hennicke as Professor Eugen Bleuler

Arndt Schwering-Sohnrey as Sándor Ferenczi

Mignon Remé as Jung's Secretary

Mareike Carrière as Food Nurse

Franziska Arndt as Bath Nurse

Wladimir Matuchin as Nikolai Spielrein

André Dietz as Medical Policeman

Anna Thalbach as Bathtub Patient

Sarah Marecek as Orchard Nurse

Björn Geske as Orderly

Markus Haase as Orderly

Christian Serritiello as Ship's Officer

Clemens Giebel as Ship's Steward

Theo Meller as Karl Abraham

Jost Grix as Leonhard Seif

Severin von Hoensbroech as Johan van Ophuijsen

Torsten Knippertz as Ernest Jones

Dirk S. Greis as Franz Riklin

Katharina Palm as Martha Freud

Nina Azizi as Minna Bernays

Julie Chevallier as Anna Freud

Cynthia Cosima as Sophie Freud

Mirko Guckeisen as Ernst Freud

Julia Mack as Mathilde Freud

Andrea Magro as Jean Freud

Aaron Keller as Oliver Freud

Nadine Salomon as Maid at Freud's House

Naike Jaszczyk as Agathe Jung

Sarah Adams as Gret Jung