José Ferrer as Captain Alfred Dreyfus

Anton Walbrook as Maj. Esterhazy

Viveca Lindfors as Lucie Dreyfus

Leo Genn as Maj. Picquart

Emlyn Williams as Emile Zola

David Farrar as Mathieu Dreyfus

Donald Wolfit as Gen. Mercier

Herbert Lom as Maj. DuPaty de Clam

Harry Andrews as Maj. Henry

Felix Aylmer as Edgar Demange

Peter Illing as Georges Clemenceau

George Coulouris as Colonel Sandherr

Carl Jaffe as Colonel Maximilian von Schwarzkoppen

Eric Pohlmann as Bertillon

John Chandos as Drumont

Ernest Clark as Prosecutor at First Dreyfus Trial

Anthony Ireland as Judge at First Dreyfus Trial

John Phillips as Prosecutor at Esterhazy Trial

Laurence Naismith as Judge at Esterhazy Trial

Michael Hordern as Prosecutor at Second Dreyfus Trial

Keith Pyott as Judge at Second Dreyfus Trial

Ronald Howard as Captain Avril

Charles Gray as Captain Brossard

Arthur Howard as Captain Lauth

Michael Trubshawe as English Publisher

Violet Gould as Old Woman

Malcolm Keen as President of France

Rachel Lemkov as Captain Dreyfus' Daughter