 | Peter Sellers als Mr. Hoffman |
 | Sinéad Cusack als Miss Smith |
 | Jeremy Bulloch als Tom Mitchell |
 | Ruth Dunning als Mrs. Mitchell |
 | David Lodge als Foreman (uncredited) |
 | George Hilsdon als Ticket Collector Kings Cross (uncredited) |
| John Tatum als Man in Restaurant (uncredited) |
| Kay Hall als (uncredited) |
| Alvin Rakoff | Director |
| Ernest Gebler | Novel |
| Ernest Gebler | Screenplay |
| Ben Arbeid | Producer |
| Ron Grainer | Original Music Composer |
| Gerry Turpin | Director of Photography |
| Barrie Vince | Editor |
| John Blezard | Art Direction |
