Patrick Magee as Marquis de Sade

Ian Richardson as Jean-Paul Marat

Michael Williams as Herald

Clifford Rose as Monsieur Coulmier

Glenda Jackson as Charlotte Corday

Freddie Jones as Cucurucu

Hugh Sullivan as Kokol

John Hussey as Newly Rich Lady

William Morgan Sheppard as A Mad Animal

Jonathan Burn as Polpoch

Jeanette Landis as Rossignol

Robert Langdon Lloyd as Jacques Roux (as Robert Lloyd)

John Steiner as Monsieur Dupere

James Mellor as Schoolmaster

Henry Woolf as Father

John Harwood as Voltaire

Leon Lissek as Lavoisier

Susan Williamson as Simone Evrard

Carol Raymont as Patient

Mary Allen as Patient

Brenda Kempner as Madame Coulmier

Mark Jones as Mother

Maroussia Frank as Patient

Tamara Fuerst as Patient

Sheila Grant as Patient

Lynn Pinkney as Patient

Ian Hogg as Military Representative

Ruth Baker as Mademoiselle Coulmier

Michael Farnsworth as Patient

Guy Gordon as Patient

Michael Percival as Patient

Heather Canning as Nun

Jennifer Tudor as Nun

Tim Hardy as Guard (as Timothy Hardy)

Stanford Trowell as Guard