| Bob Monkhouse |
David Cookson |
| Kenneth Connor |
Sam Field |
| Shirley Eaton |
Jill Venner |
| Eric Barker |
Colonel J. J. Proudfoot |
| Eric Barker |
The Dean |
| Richard Wattis |
Macreedy |
| Ronnie Stevens |
Brian Dexter |
| Reginald Beckwith |
Mr. Duff |
| Graham Stark |
Sourfaced Man |
| Mercy Haystead |
Miss Figg |
| Charlotte Mitchell |
Mrs. Burke (Customer) |
| Jeremy Hawk |
Professor Lovitt |
| David Horne |
Admiral Southbound |
| David Glover |
Mr. Bull |
| Ian Whittaker |
Mr. Fuller |
| Charles Hawtrey |
Mr. Roper |
| Richard Caldicot |
Prison Governor |
| Court Benson |
Senator Whiteshafts |
| Sheena Marshe |
Lolita Roughage |
| Cyril Chamberlain |
Director |
| Patrick Holt |
News Reader |
| Fredric Abbott (as Fred Abbott) |
1st M.P. |
| Neil Hallett |
Warder |
| William Young |
Assistant Director |
| Bernard Hunter |
First Official |
| Lawrence Brooks |
Operator |
| Alec Dane |
Gong Man |
| Terry Skelton |
Sink Man |
| Margaret Lacey |
Old Lady Contestant |
| Keith Fordyce |
Commentator |
| Anthony Bate |
Scientist |
| Andrea Lawrence |
Girl in Factory |
| Eddie Boyce |
2nd M.P. |
| Valerie Holman |
Carol Potter |
| Valerie Pitts |
Pat Horrocks |
| Bettine le Beau |
Judith Dobbin |
| Julie Samuel (as Julie Samuels) |
Penelope Allcock |
| Marion Collins (as Marian Collins) |
Fifth Girl |
| Marie Fidock |
Sixth Girl |
| Alfie Dean |
Bruiser |
| Marie Devereux |
Brunette |
| Julian Holloway |
Lab Boy |
| Linda Castle |
Nurse |
| Valli Newby |
Cheeky Brunette |
| Gerry Duggan |
Commissionaire |
| Brian Nissen |
City Gent |
| Michael Miles |
Self |