Adaptation

The Return of Sherlock Holmes

This TV Film was aired on 10 January 1987, by CBS.
IMDb: The Return of Sherlock Holmes 
Letterboxd: The Return of Sherlock Holmes 

Canon basis: The Sign of the Four

Sherlock Holmes played by: Michael Pennington
Dr. Watson played by: Margaret Colin

Turn on <canvas>.
Cast
Michael Pennington as Sherlock Holmes
Margaret Colin as Jane Watson
Barry Morse as Carter Morstan
Connie Booth as Violet Morstan
Miles Richardson as Barton
Tony Steedman as Doctor
Olivier Pierre as Hampton
Paul Maxwell as Hopkins
Lila Kaye as Ms. Houston
Sheila Brand as Kitty
Daniel Benzali as Ross
Ray Jewers as Singer
William Hootkins as Spelman
Shane Rimmer as Stark
Nicholas Guest as Toby