- Novel By:
- C. E. Montague
- Adapted By:
- Peter Watts
- Produced By:
- Peter Watts
- Unknown:
- Peter Watts
- Major John Willan:
- Robin Bailey
- Capt Lovel-Waters of the Rivan Army:
- Richard Martin
- Cyril Burnase, Editor of The Voice of Riva:
- Howard Marion-Crawford
- Hendie, Music Critic of The Voice:
- Leonard Trolley
- Rose Burnage:
- Barbara Couper
- Bishop Case:
- Howieson Culff
- Mrs Case:
- Molly Rankin
- Professor Howell:
- Martin Lewis
- Clare, his daughter:
- Joan Hart
- General Miln, Rivan commander-in-chief:
- Emerton Court
- Captain Merrick, a staff:
- David Enders
- Second-Lieut Seaton:
- Charles Hodgson
- Colonel Forsyth, Brigade Commander:
- Eric Anderson
- Jack Oscroft, war correspondent:
- John Glen
- A pilot:
- Robert Sansom
- General Delarey, Portan Commander-in-Chief:
- Malcolm Hayes
- A Portan surgeon:
- James Thomason
- Prosecuting Counsel:
- Norman Wynne
- A Portan prison governor:
- Peter Neil