| Robin Nedwell | as | Duncan Waring | |
| Geoffrey Davies | as | Dick Stuart-Clark | |
| George Layton | as | Paul Collier (Series 2) | |
| Ernest Clark | as | Professor Geoffrey Loftus | |
| Jacquie-Ann Carr | as | Katherine Wright | |
| John Kane | as | Andrew MacKenzie | |
| Andrew Knox | as | James Gascoigne |
Series: 2
Episodes: 26
Transmitted: 1975-1977
Channel: ITV
London Weekend Television