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Cecil Parker as Professor Canford |
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George Cole as 'Flash' Harry Cuthbert Edwards |
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Joyce Grenfell as Sergeant Ruby Gates |
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Eric Barker as Culpepper-Brown |
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Thorley Walters as Butters |
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Irene Handl as Miss Harker-Parker |
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Dennis Price as Gore Blackwood |
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Sidney James as Alphonse O'Reilly |
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Julie Alexander as Rosalie Dawn |
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Lloyd Lamble as Superintendent Samuel Kemp-Bird |
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Raymond Huntley as Judge Slender |
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Nicholas Phipps as Major Hargreaves |
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Lisa Lee as Miss Brenner |
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John Le Mesurier as Minister of Education |
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George Benson as Defence Counsel |
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Elwyn Brook-Jones as Emir |
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Basil Dignam as Army Officer |
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Cyril Chamberlain as Army Captain |
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Michael Ripper as Liftman |
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Mark Dignam as Prosecuting Counsel |
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Monte Landis as Octavius |
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Warren Mitchell as Tailor |
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Clive Morton as V.I.P. |
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Wensley Pithey as Chief Constable |
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Liz Fraser as WPC Susan Partridge |
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Bill Shine as Usher |
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Edina Ronay as Lavinia (uncredited) |
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Erica Rogers as Bobbie (uncredited) |
| Writing | Frank Launder | Writer |
| Writing | Val Valentine | Writer |
| Writing | Sidney Gilliat | Writer |
| Directing | Frank Launder | Director |
| Camera | Gerald Gibbs | Director of Photography |
| Sound | Malcolm Arnold | Original Music Composer |
| Camera | Arthur Evans | Still Photographer |
| Editing | Thelma Connell | Editor |
| Production | Sidney Gilliat | Producer |
| Production | Frank Launder | Producer |
| Production | Leslie Gilliat | Associate Producer |
| Writing | Ronald Searle | Characters |
