First broadcast 3rd May 1985.
Investigating the mysterious death of a man found floating in the river, Pru finds that an official 'block' has been put on the case.
David Garlick - Gonzo
Leslie Ash - Fred Smith
David Baxt - Lyman
Bob Sherman - Vic
Leonard Trolley - Dr. Chalmers
Anthony Milner - Inspector Phelps
Jill Gascoine - Maggie Forbes
James Cosmo - McNeill
Rosalyn Landor - Pru Standfast
Richard Beale - Prinley
Peter Dennis - Desmond Proudfoot
John Arthur - Mike
John Ringham - Sir Patrick Swinnerton
Ed Devereaux - Gerry Sanders
Don Warrington - Nigel Beaumont
Ron Berglas - Gino
Linda Lou Allen - Abby
Jake Anthony - Sam
Terry Duran - Tony
