| Robin Nedwell | as | Duncan Waring | |
| George Layton | as | Paul Collier | |
| Geoffrey Davies | as | Dick Stuart-Clark | |
| Richard O'Sullivan | as | Lawrence Bingham | |
| Ernest Clark | as | Professor Geoffrey Loftus | |
| Sammie Winmill | as | Nurse Sandra Crumpton |
Series: 2
Episodes: 43
Transmitted: 1972-1973
Channel: ITV
London Weekend Television