- Writer:
- Elmer Rice
- Designer:
- Tony Abbott
- Producer:
- Elwyn Jones
- Lydla Kuman:
- Adrienne Corri
- George Khitov:
- John Carson
- Schneider:
- Neil McCarthy
- Vlora:
- Bernard Archard
- Slatarski:
- Ronald Adam
- Tsankov:
- Gerald Cross
- Sturdza:
- Christopher Steele
- Murusi:
- Robert Webber
- Dr Bathory:
- George Coulouris
- Dr Stambulov:
- Walter Horsbrugh
- Conrad Noli:
- Graydon Gould
- Dr Mensch:
- Allan McClelland
- Dr Parvan:
- John Westbrook
- Bassaraba:
- Cyril Shaps
- Madame Teodorova:
- Freda Bamford
- Sonia Kuman:
- Diane Gray
- Witnesses:
- General Rakovski: John Slater
- Madame Crevelll:
- Isa Miranda
- President Vesnic:
- Robert Bernal
- Captain Marek:
- John Downing
- Lieutenant Nekludov:
- Nicholas Light
- Gherea:
- Dudley Foster
- Srazhimir:
- Kenneth Warren
- Vidin:
- Neville Irons
- Pekmesi:
- Ralph Ball
- The priest:
- Bernard Brown
