First broadcast 6th April 1988.
While convalescing in Cornwall, a depressive Holmes investigates the apparent death from apoplexy of a local woman and the unexplained sudden dementia of her two brothers.
Jeremy Brett ... Sherlock Holmes
Edward Hardwicke ... Dr Watson
Denis Quilley ... Dr Leon Sterndale
Damien Thomas ... Mortimer Tregennis
Michael Aitkens ... Reverend Roundhay
Freda Dowie ... Mrs Porter
Norman Bowler ... Owen Tregennis
Peter Shaw ... George Tregennis
Christine Collins ... Brenda Tregennis
John Saunders ... Dr Richards
Frank Moorey ... Police Inspector
Nick Ryall ... Policeman in House
