Vernon and David are travelling in a tanker which overturns spilling its load. Vernon is taken to hospital with memory loss and David claims not to know what they were carrying. The police discover that the tanker has false number plates and its contents are contaminating the water supply.
| Name | Type | Role | |
|---|---|---|---|
| Ian Carmichael | Guest Star | T J Middleditch | |
| David Birrell | Actor | Eddie Owen | |
| Mark Jordon | Actor | PC Bellamy | |
| Geoffrey Hughes | Actor | Vernon Scripps | |
| Linda Armstrong | Actor | Sister Brigid | |
| Derek Fowlds | Actor | Oscar Blaketon | |
| Colin Prockter | Actor | Mr Arkwright | |
| Michelle Hardwick | Actor | Lizzie Kennoway | |
| Jason Durr | Actor | PC Bradley | |
| Tricia Penrose | Actor | Gina Ward | |
| Amy Robbins | Actor | Dr Jill Weatherill | |
| Martin Troakes | Actor | Leonard | |
| Robert Daws | Actor | Dr Gordon Ormerod | |
| Francis Matthews | Actor | Dr James Alway | |
| Ken Bones | Actor | Mr Mansell | |
| Zoie Kennedy | Actor | Staff Nurse Meryl Taylor | |
| Michael Starke | Actor | Ken Hopkirk | |
| Duncan Bell | Actor | Sergeant Merton | |
| Sarah Tansey | Actor | Jenny Latimer | |
| William Simons | Actor | PC Ventress | |
| David Lonsdale | Actor | David | |
| Andy Wear | Actor | Alun Morris | |
| Peter Benson | Actor | Bernie Scripps |