Merton and his team set out to find the saboteur behind a series of rigged accidents in the lead-up to the Aidensfield Hill Climb, an annual race for motor cars. Meanwhile, Liz Merrick grows concerned about a man sleeping rough who she suspects may be suffering from asbestos poisoning, and Vernon finds - then loses - a fortune.
| Name | Type | Role | |
|---|---|---|---|
| Duncan Gould | Writer | ||
| Gareth Thomas | Guest Star | Nathaniel Clegghorn | |
| Gerard Kearns | Guest Star | Trevor Black | |
| Noreen Kershaw | Director | ||
| Aislín McGuckin | Actor | Dr Liz Merrick | |
| Richard Lintern | Actor | Ben Norton | |
| Derek Fowlds | Actor | Oscar Blaketon | |
| Geoffrey Hughes | Actor | Vernon Scripps | |
| James Carlton | Actor | PC Crane | |
| Mark Jordon | Actor | PC Bellamy | |
| David Lonsdale | Actor | David | |
| Duncan Bell | Actor | Sergeant Merton | |
| Andrew Dunn | Actor | Eric Evans | |
| Tricia Penrose | Actor | Gina Ward | |
| Peter Benson | Actor | Bernie Scripps | |
| Sarah Tansey | Actor | Jenny Merton | |
| William Simons | Actor | Alf Ventress | |
| Paul Goodwin | Actor | Geoffrey Smee |