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Roland Culver as Patrick Pryton |
 |
John Bryans as Holden Britwell |
 |
Donald Hewlett as William Featherstone |
 |
Andrew Sachs as Nigel Fenn |
|
Robert Sansom as Sir Lionel Pratt |
 |
Robert Morris as Bobby Touche |
 |
Mona Washbourne as Julia Pryton |
 |
Basil Dignam as Sebastian Fleming |
|
William Kendall as Andrew Lodge |
|
Maurice Hedley as Lord Densham |
|
Paul Williamson as George Crowell |
 |
Basil Henson as Charles Baldon |
 |
Earl Cameron as Dr. Henry Mbala |
|
Henry Moxon as David Turville |
|
John Boxer as John Straker |
 |
Jack Gwillim as Admiral Sir Guy Lawrence |
| Directing | Michael Apted | Director |
| Writing | Ronald Miller | Writer |
| Writing | John Finch | Writer |
| Production | Julian Amyes | Producer |
