Guest Stars David Gooderson as Derek Simpkins, Pathologist Paul Moriarty as Sgt. Bill Wells Caroline Harker as WPC Hazel Wallace Stuart Barren as Sgt. Johnnie Johnson Jon Sotherton as DC Mark Howard Ian Driver as DC Jordan Christopher Rickwood as PC Stringer Tony Haygarth as DS Sandy Gilmore Charles Dale as Colin Fletcher Denise Black as Jen Hamilton John Bleasdale as Bernard Hicks Bunny May as Geoffrey Rickman Amanda Elwes as Alex Compton Annabel Leventon as Marion Diane Bull as Cheryl Bartlett John Vine as Michael Bell Steve Swinscoe as Sean Hamilton Dominic Jephcott as George Compton