An English professor decides that there are too many useless people in the world and invents a gas that will kill them off. But first they'll at least have a good laugh.
| Directing | Don Chaffey | Director |
| Writing | Robert Hamer | Writer |
| Writing | C.E. Vulliamy | Novel |
| Writing | Donald Taylor | Screenplay |
| Production | Donald Taylor | Producer |
| Sound | John Barry | Music |
| Camera | Gerald Gibbs | Director of Photography |
| Editing | Peter Tanner | Editor |
| Art | George Provis | Art Direction |
| Directing | Dennis Bertera | Assistant Director |
| Directing | Barrie Melrose | Second Assistant Director |
| Sound | H.L. Bird | Sound |
| Sound | Bill Blunden | Sound Editor |
