- Novel By:
- Nevil Shute
- Adapted By:
- Stephen Grenfell
- Unknown:
- Geoffrey Matthews
- Unknown:
- Penelope Lee
- Played By:
- Patricia Leventon
- Played By:
- Gordon Gardner
- Played By:
- Wesley Murphy
- Played By:
- Stephen Thorne
- Played By:
- Glyn Dearman
- Produced By:
- Betty Davies
- Narrator:
- Gabriel Woolf
- Jerry:
- Geoffrey £atthews
- Mona:
- Penelope Lee
- Wing Commander Dickens:
- Frederick Treves
- Captain Burnaby:
- Ralph Truman
- Miriam:
- Valerie Kirkbright
- Commander Rutherford:
- Kenneth Hyde
- Trawler Commander:
- Kevin Flood
- Flight Lieutenant Hooper:
- Gordon Faith
- Air Force C O:
- Norman Claridge
- Wing Commander Hewitt:
- Garard Green
- Professor Legge:
- Hamilton Dyce
- Mrs Burnaby:
- Olga Lindo
- Mona's Father:
- John Boxer
- Commander Sutton:
- Alan Haines
- Nurse Loring.:
- Margaret Wolfit
- Nurse Mackenzie:
- Dorothy Smith
- Admiral:
- William Fox
- Jorgen:
- George Hagan
