| Scott Forbes | ... | Roman | |
| Frank Pettingell | ... | Commodore Grant | |
| Donald Churchill | ... | Michael Holland | |
| rest of cast listed alphabetically: | |||
| Ian Anderson | ... | Engineer | |
| Michael Balfour | ... | Mr. Bollanger | |
| Norman Bowler | ... | Wainwright | |
| Madeleine Burgess | ... | Mrs. Bollanger | |
| Michael Caine | ... | Helmsman | |
| John Collin | ... | Sullivan | |
| Graham Corry | ... | Engineer | |
| Jemma Hyde | ... | Ann Shields | |
| Richard Klee | ... | Steward | |
| Peter Sinclair | ... | Chief Engineer | |
| Philip Stone | ... | Sir Ronald Caterham | |
| Tony Veale | ... | Engineer | |
| Harry Webster | ... | Anderson | |
| Episode Crew |
Directed by | |||
| Alan Cooke | |||
Writing credits(in alphabetical order) | ||
| Christopher Hodder-Williams | writer | |
Produced by | |||
| Sydney Newman | .... | producer | |
Production Design by | |||
| Assheton Gorton | |||
Music Department | |||
| Robert Farnon | .... | composer: theme music "Proscenium" (uncredited) | |
| Main series | Episode guide | Full cast and crew |
| Company credits | IMDb TV section | IMDb Comedy section |
| IMDb UK section |