- Author:
- Maurice Edelman
- Adapter:
- Anthony Steven
- Designer:
- Stanley Morris
- Producer:
- Cedric Messina
- Director:
- Waris Hussein
- Ambulance driver:
- John Baker
- Colonel Fitch:
- Gerald Sim
- Miss Payne:
- Joan Mane
- Sir Edgar Jones:
- Griffith Jones
- Prime Minister:
- John Wentworth
- Sir Harold Raeburn:
- Llewellyn Rees
- Bob Rogers:
- John Bown
- Patricia Ellison:
- Maxine Audley
- Harrington Slade:
- Jerry Stovin
- Peter Masters:
- Richard Leech
- Elinor Liphook:
- Jane Meredith
- Henry Gore-Browne:
- Richard Vernon
- Louise Slade:
- Irena Mayeska
- Casimir Gladowitz:
- Frederick Bartman
- Mrs. Gorman:
- Elsie Arnold
- Reporter:
- Walter Hall
- Special Branch man:
- Godfrey Jackman
- Cornford:
- Ballard Berkeley
- Smith:
- John Bryans
- Young man:
- Jonathan Drew
- Man from St Anselm's:
- Ian Flintoff
- Hodgkin:
- David Garth
- Speaker:
- John Kidd
- Orderly:
- Alan Haywood
- Woman in St James's:
- Honora Burke
- Repton:
- Colin Rix