- Novel By:
- Nevil Shute
- Production By:
- Raymond Raikes
- Miss Learoyd, Dr Scott's secretary:
- Janet Burnell
- Dr. Scott, head of a department at the Royal Aircraft Establishment,Farnborough:
- Sebastian Shaw
- Director of the R A E:
- Allan Jeayes
- Professor Theodore Honey, a scientist at the R.A.E:
- Michael Bates
- Group Captain Fisher, Inspector of Accidents:
- George Merritt
- Elspeth, Professor Honey's daughter:
- Mairhi Russell
- Ferguson, an official in the Depart ment of Experiment and Research Ministry of Supply:
- Edgar Norfolk
- Shirley, Dr Scott's wife:
- Margot Shortman
- Marjorie Corder, an air hostess:
- Mary Law
- Of the crew of a Reindeer Aircraft:First Officer Dobson:
- Peter Howell
- Capt Samuelson Christopher Hodge Monica Teesdale, a film star:
- Helen Horton
- Symes, Air Registration Board Inspector at Gander, Newfoundland:
- Jeffrey Segal
- Carnegie, Technical Superintendent of the Central Air Transport Organisation (CATO):
- Ian Sadler
- Dr Martin, a G P:
- Derek Birch
- Sir David Moon, Managing Direotor of CATO:
- Arthur Young
- E. P. Prendergast, Chief Designer of the Rutland Aircraft Co:
- James McKechnie
- Squadron Leader Russell, Inspector of Accidents (Canadian Ministry of Civil Aviation):
- Marvin Kane
- Stubbs, his assistant:
- Peter Claughton
- Hennessey, a Canadian bush-pilot:
- Ian Sadler
- Group Capt. Porter, Director . of Canadian Civil Aviation:
- Tommy Duggan
