Patrick Magee
Marquis de Sade
Ian Richardson
Jean-Paul Marat
Michael Williams
Herald
Clifford Rose
Monsieur Coulmier
Glenda Jackson
Charlotte Corday
Freddie Jones
Cucurucu
Hugh Sullivan
Kokol
John Hussey
Newly Rich Lady
William Morgan Sheppard
A Mad Animal
Jonathan Burn
Polpoch
Jeanette Landis
Rossignol
Robert Langdon Lloyd
Jacques Roux (as Robert Lloyd)
John Steiner
Monsieur Dupere
James Mellor
Schoolmaster
Henry Woolf
Father
John Harwood
Voltaire
Leon Lissek
Lavoisier
Susan Williamson
Simone Evrard
Carol Raymont
Patient
Mary Allen
Patient
Brenda Kempner
Madame Coulmier
Mark Jones
Mother
Maroussia Frank
Patient
Tamara Fuerst
Patient
Sheila Grant
Patient
Lynn Pinkney
Patient
Ian Hogg
Military Representative
Ruth Baker
Mademoiselle Coulmier
Michael Farnsworth
Patient
Guy Gordon
Patient
Michael Percival
Patient
Heather Canning
Nun
Jennifer Tudor
Nun
Tim Hardy
Guard (as Timothy Hardy)
Stanford Trowell
Guard