A Message from the Deep Sea: This episode features Dr Thorndyke, played by John Neville, who is first a medical man and second a solver of mysteries. A young girl has been murdered in her boarding house and the solution looks obvious – but is it?
Cast: John Neville (Doctor Thorndyke), James Cossins (Doctor Jervis), Bernard Archard (Doctor Davidson), Terence Rigby (Detective Sergeant Bates), Eve Pearce (Mrs Goldstein), Morris Perry (Coroner), Paul Darrow (Doctor Hart), Nicholas Smith (Solicitor), Edward Dentith (Superintendent Miller), Ray Lonnen (Sam Turner), Jean Marlowe (May O’Brien), Stanley Miller (Paul Petrofsky), Frank Mills (Polton), Valerie Bell (Kate Wilfer), Joanna Cooper (Edith Johnson)
Writer: Philip Mackie / Director: James Goddard
Original Airdate: 20 Sep 1971 on ITV
Series: The Rivals Of Sherlock Holmes Season 1 Episode 1