First broadcast 23rd August 1980.

A man is found shot dead in his office with only his nonchalant client present, but where's the gun?

Roy Marsden ... Chief Inspector Walters
Jeremy Clyde ... George Stamford
Dudley Sutton ... Det. Sgt. Jack Sherrard
Elizabeth Richardson ... Clarissa Tower
John Gill ... Alec MacTaggart
Geoffrey Lumsden ... Solicitor
Peter Macklin ... Police Constable Harris (as Peter Macklen)
Richard Barnes ... Charles Hearn