30 Is a Dangerous Age, Cynthia! (1968) — Cast
Cast
| Micheál Mac Liammóir | Storyteller |
| Peter Bayliss | Victor |
| Patricia Routledge | Mrs. Dunn |
| Dudley Moore | Rupert Pupkin |
| John Wells | Gywn Hopton |
| Derek Farr | Announcer |
| Nicky Henson | Paul |
| Frank Thornton | Armageddon Registrar |
| Duncan Macrae | McCue |
| Clive Dunn | Doctor |
| Jonathan Routh | Gore |
| Eddie Foy Jr. | Oscar |
| Harry Towb | Mr. Vornick |
| Ted Dicks Jr. | Horst |
| John Bird | Greenslade |
| Suzy Kendall | Louise |
Crew
| Billy Williams | Director of Photography |
| Dudley Moore | Original Music Composer |
| Richard Williams | Title Graphics |
| Walter Shenson | Producer |
| Joseph McGrath | Director |
| Bill Blunden | Editor |
| Dudley Moore | Writer |
| Joseph McGrath | Writer |
| John Wells | Writer |