Sherlock Holmes, Jr is a 2027 Netflix original series.It tells the adventures of the son of Sherlock Holmes.


The show tells the story of the son of Sherlock Holmes (who died alongside his arch nemesis,Professor Moriarty at the Reichenbach Falls eleven years before the show) who shares his late father’s name and nack for solving crimes. Now, with Dr. Watson’s daughter, Jane (who has a crush on him) they try to solve mysteries who‘s culprit is none other than Morris, the nephew of Professor Moriarty.

At the end of the show, Sherlock Holmes, Sr saves his son’s life and reveals that how he faked his death. After the episode’s credits, a man in disguise bails Morris out of jail and takes off his disguise to reveal himself as Moriarty, (faked his death).


  • Jorge Diaz as Sherlock Holmes, Jr, the son of the late Sherlock Holmes and Irene Adler
  • Kate Micucci as Jane Watson, the daughter of Dr. Watson and Mary Mortan
  • Luke Treadaway as Morris, the nephew of the late Professor Moriarty
  • Isabella Acres as Mary Hudson, Mrs. Hudson‘s granddaughter
  • Adam Pally as Michael Holmes, the teenage son of Mycroft Holmes and Sherlock, Jr’s cousin

Guest Stars

  • John Oliver as Sherlock Holmes, Sherlock, Jr’s late father who appears in flashback scenes throughout the show.
  • Stephen Fry as Dr. Watson, Jane‘s distressed father and former assistant to the late Sherlock Holmes.
  • Alfred Molina as Professor Moriarty, Morris’ late uncle and the arch nemesis of the late Sherlock Holmes, who also appears in flashback scenes throughout the show.
  • J.K. Simmons as Mycroft Holmes, Sherlock Holmes’ older brother, Michael’s father and Sherlock Jr’s uncle who’s voice is constantly heard throughout the show.
  • Mara Wilson as Irene Adler, the fiancée of the late Sherlock Holmes and the mother of Sherlock, Jr.

List of episodes

List of Sherlock Holmes, Jr episodes


  • John Oliver previously voiced Sherlock Holmes in the Gravity Falls episode “Headhunters”
  • Stephen Fry played Mycroft in “Sherlock Holmes: A Game of Shadows“


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