Sherlock Holmes in the 22nd Century — Season 1, Episode 10: The Sign of Four

Episode synopsis

Mary Morstan comes to Holmes with a problem. The solution of that problem, however, will lead them clear to the moon! Mary's father had been killed in a mine accident on the moon years ago. Now Mary is finding out that the circumstances were strange then, and the sequel is even stranger now.

About Sherlock Holmes in the 22nd Century

Sherlock Holmes fights crime in the 22nd Century with help from his loyal friend, Dr. Watson, who is programmed into the brain of an android.

More episodes from Season 1

• E1The Fall and Rise of Sherlock Holmes
• E2The Crime Machine
• E3The Hounds of the Baskervilles
• E4The Adventure of the Empty House
• E5The Crooked Man
• E6The Adventure of the Deranged Detective
• E7The Adventure of the Sussex Vampire Lot
• E8The Scales of Justice
• E9The Resident Patient
• E11The Adventure of the Dancing Men
• E12The Musgrave Ritual
• E13The Adventure of the Blue Carbuncle