| Cast |
| Alec Guinness |
William Horatio Ambrose/six ancestors
|
| Irene Browne |
Arabella Barrington
|
| Maurice Denham |
Mayor Crowley
|
| Percy Herbert |
Tommy
|
| Victor Maddern |
Figg
|
| Allan Cuthbertson |
Councillor Chailey
|
| Harold Goodwin |
Duckworth
|
| Richard Wattis |
Registrar of shipping
|
| Lionel Jeffries |
Garrod
|
| George Rose |
Bullen
|
| Lloyd Lamble |
Supt. Browning
|
| Harry Locke |
Peters, reporter
|
| Mike Morgan |
Larry
|
| Max Butterfield |
Phil
|
| Donald Churchill |
Teddy boy
|
| Jackie Collins |
June
|
| Frederick Piper |
Harry, barman
|
| Fred Griffiths |
Bus Driver
|
| Gerald Case |
Commander
|
| William Mervyn |
Captain
|
| John Horsley |
First Surgeon
|
| Derek Waring |
Second Surgeon
|
| Donald Pleasence |
Bank teller
|
| Newton Blick |
Bank Manager
|
| Junia Crawford |
Evie
|
|
| Crew |
| Director |
Charles Frend |
| Writer |
T.E.B. Clarke |
| Producer |
Michael Balcon |
|