Mycroft Holmes is a fictional character appearing in stories written by Sir Arthur Conan Doyle from 1893 to 1908. The elder brother (by seven years) of detective Sherlock Holmes, he is a government official and a founding member of the Diogenes Club. Mycroft is described as having abilities of deduction and knowledge exceeding even those of his brother, though their practical use is limited by his dislike of fieldwork.
Fictional character biography History and occupation Mycroft Holmes is Sherlock Holmes's older brother. He mainly appears in two stories by Doyle, "The Adventure of the Greek Interpreter" and "The Adventure of the Bruce-Partington Plans". He also appears briefly in "The Final Problem", and is mentioned in "The Adventure of the Empty House".
He first appears in "The Greek Interpreter", in which he brings Sherlock a case involving one of his neighbours. Sherlock Holmes tells Dr. Watson that Mycroft has powers of observation and deduction superior to his own, but is not energetic or ambitious, nor does he have the capacity to prepare a case for trial. He also says that some of his most interesting cases have come to him through Mycroft. In the story, Sherlock Holmes and Dr. Watson visit Mycroft at the Diogenes Club, which Mycroft co-founded. Mycroft also visits 221B Baker Street.
Mycroft makes a brief appearance in "The Final Problem". Sherlock Holmes gives Dr. Watson instructions to take a certain route to leave London to avoid Moriarty's gang, and part of this plan involves a ride in a brougham driven by a cloaked driver. Watson sees the coachman and does not recognise him. Sherlock later tells Watson that the driver was Mycroft. Near the end of the story after Sherlock's supposed death, Watson reads a letter left by Sherlock, which includes the statement, "I made every disposition of my property before leaving England, and handed it to my brother Mycroft."
In "The Empty House", it is revealed that Sherlock Holmes faked his death in "The Final Problem" and subsequently went abroad. His only confidant during this time was Mycroft, who provided him with the money he needed. When Sherlock returned to London, he found that Mycroft had preserved his Baker Street rooms and his papers "exactly as they had always been".
In "The Bruce-Partington Plans", Mycroft goes to Baker Street to speak with his brother about recovering missing submarine plans for the government. Sherlock Holmes says in this story that Mycroft only visited 221B Baker Street once before. Though Sherlock initially told Watson in "The Greek Interpreter" that Mycroft audits books for the British government, he reveals to Watson in "The Bruce-Partington Plans" that Mycroft's true role is more substantial:
Mycroft has a unique position in the government, which is not named in the stories. Sherlock comments regarding Mycroft's role that there "has never been anything like it before, nor will be again" and that Mycroft "has the tidiest and most orderly brain, with the greatest capacity for storing facts, of any man living". He describes Mycroft's position:
He adds to this that Mycroft thinks of nothing other than government policy, except when he asks Mycroft to advise him on one of his cases.
Several Holmesian scholars have proposed theories about Mycroft, though none of these are confirmed in the stories. In "The Adventure of Black Peter", Dr. Watson records that Sherlock Holmes could assume various disguises in "at least five small refuges" which he had in different parts of London; Vincent Starrett wrote that Mycroft's residence "would certainly be one of them".Klinger, Leslie (ed.). The New Annotated Sherlock Holmes, Volume II (New York: W. W. Norton, 2005). p. 979. Ronald A. Knox suggested that Mycroft was a double agent who assisted both Sherlock and Professor Moriarty, with the goal of ultimately betraying Moriarty and members of his gang, including Colonel Moran.Klinger, Leslie (ed.). The New Annotated Sherlock Holmes, Volume II (New York: W. W. Norton, 2005). p. 801. June Thomson theorised that Mycroft nominated Sherlock to infiltrate the German spy ring in "His Last Bow" (set in 1914) and might have persuaded Sherlock to come out of retirement. Thomson calculated that Mycroft would have retired himself in 1912 at the age of sixty-five years old, but would have maintained his connections with former colleagues in the government.Klinger, Leslie (ed.). The New Annotated Sherlock Holmes, Volume II (New York: W. W. Norton, 2005). p. 1439.
Personality and habits Possessing deductive powers exceeding even those of his younger brother, Mycroft is nevertheless unsuitable for performing detective work as he is unwilling to put in the physical effort necessary to bring cases to their conclusions. In "The Adventure of the Greek Interpreter", Sherlock Holmes says:
Mycroft does not have ambitions of any kind, according to Sherlock. Despite being "the most indispensable man in the country", as Sherlock says, Mycroft remains a subordinate, will receive "neither honour nor title", and his relatively modest annual salary in "The Bruce-Partington Plans" (which takes place in 1895) is £450 ().
He lives in rooms in Pall Mall. His regular routine is to walk around the corner each morning to Whitehall where he works, and in the evening, to walk back to Pall Mall. He then stays at the Diogenes Club, which is located across from his lodgings in Pall Mall, from quarter to five until twenty to eight. He seldom breaks this routine or goes anywhere except these three locations.
Mycroft reads Watson's accounts of Sherlock's adventures and takes an interest in Sherlock's cases. In "The Greek Interpreter", he takes snuff from a tortoise-shell box while at the Diogenes Club, and brushes the grains from his coat with a large, red silk handkerchief. He is also seen "sitting smoking in the armchair" at Baker Street. Mycroft is occasionally referred to by Sherlock Holmes as "Brother Mycroft" in "The Bruce-Partington Plans". He is the only character to refer to Sherlock exclusively by his first name.
Appearance and age Mycroft resembles his brother Sherlock Holmes, but is described in "The Greek Interpreter" as being "a much larger and stouter man". According to Watson, Mycroft's eyes are "a peculiarly light, watery grey" and always have "that far-away, introspective look" which Watson had only seen in Sherlock's when he exerted his full powers (Sherlock also has grey eyes.) In "The Final Problem", Sherlock informs Watson that the driver of the brougham (later revealed to be Mycroft) will wear "a heavy black cloak tipped at the collar with red". When Watson sees the coachman, he describes him as "a very massive driver wrapped in a dark cloak". In "The Bruce-Partington Plans", Watson states that Mycroft is "tall and portly", and gives the following description of him:
Mycroft is seven years older than Sherlock. According to Leslie S. Klinger, Mycroft was born in 1847.Klinger, Leslie (ed.). The New Annotated Sherlock Holmes, Volume I (New York: W. W. Norton, 2005). p. 752. A reference in the short story "His Last Bow", which takes place in 1914, suggests that Sherlock is sixty years old at the time. This would make the year of Sherlock's birth approximately 1854, and thus Mycroft's approximately 1847.
Adaptations
Mycroft Holmes has been portrayed many times in adaptations of the Holmes stories in film, television, radio, and other media.
Audio Episodes adapted from the stories in which Mycroft appears, "The Bruce-Partington Plans" and "The Greek Interpreter", both aired in The Adventures of Sherlock Holmes in 1931, and in The New Adventures of Sherlock Holmes in 1939 and 1940 respectively, as well as both in 1943 in the same series. No cast listing currently exists to show who portrayed Mycroft in these episodes. Rex Evans played Mycroft in at least two episodes of The New Adventures of Sherlock Holmes, which were broadcast in 1945 and 1946 respectively, with Basil Rathbone as Holmes and Nigel Bruce as Dr. Watson. In the 1950s radio series starring John Gielgud as Sherlock Holmes, Gielgud's own brother, Val Gielgud, played the part in "The Bruce-Partington Plans". In the BBC radio dramatisations with Carleton Hobbs and Norman Shelley, Mycroft was played at various times by Malcolm Graeme, Keith Williams, Felix Felton, and, in "The Empty House", by Carleton Hobbs himself. In the BBC Radio adaptations starring Clive Merrison as Sherlock and Michael Williams as Watson, John Hartley played Mycroft in "The Greek Interpreter" on 21 October 1992, "The Bruce-Partington Plans" on 24 January 1994, and "The Retired Colourman" on 29 March 1995. Mycroft, voiced by James Laurenson, also appears in a two-part episode of the BBC radio series The Further Adventures of Sherlock Holmes, again with Clive Merrison as Sherlock Holmes. Mycroft is a recurring character in the American radio series The Further Adventures of Sherlock Holmes. In 2026, Thomas Mitchells voiced Mycroft in the Sherlock & Co. podcast, in the adaptation of "The Adventure of the Greek Interpreter". Mycroft is also described as having lent a helping hand in the podcast's version of "The Adventure of the Six Napoleons" which is why the cast are sent to Greece under the guise of a holiday. In contrast to the original canon, this Mycroft is presented as a spy who is highly active in the field.
Film The first film appearance of Mycroft Holmes was in the 1922 short film The Bruce Partington Plans in the Stoll film series, where he was played by Lewis Gilbert. In the 1965 film A Study in Terror, Mycroft is played by Robert Morley. In the Billy Wilder-directed film The Private Life of Sherlock Holmes (1970), Mycroft was played by Christopher Lee. The 1975 film The Adventure of Sherlock Holmes' Smarter Brother mentions Mycroft in its introduction, who appears only in a childhood picture; Mycroft's mention sets up the introduction of a third, younger brother (not present in Doyle's original stories), Sigerson Holmes (played by Gene Wilder), who is of comparable talent but receives far less credit. Charles Gray assumed the character in both the 1976 film The Seven-Per-Cent Solution and Granada Television's Sherlock Holmes series. Peter Jeffrey played Mycroft in the 1990 film Hands of a Murderer. Stephen Fry played Mycroft in the Guy Ritchie-directed Sherlock Holmes: A Game of Shadows, released in December 2011. Hugh Laurie played Mycroft in the Will Ferrell comedy movie Holmes & Watson, released in 2018. Sam Claflin played Mycroft in the movie Enola Holmes, released in September 2022.
Television The BBC broadcast two Sherlock Holmes series in 1965 and 1968 which starred Douglas Wilmer (1965) and Peter Cushing (1968) as Sherlock and Nigel Stock as Watson. Mycroft appeared twice, once in 1965 in "The Bruce-Partington Plans" and played by Derek Francis and in 1968 in "The Greek Interpreter" and played by Ronald Adam. Boris Klyuyev played Mycroft Holmes in The Adventures of Sherlock Holmes and Dr. Watson (1979–1986), a Soviet television film series. Klyuyev was nine years younger than Vasily Livanov, who played Sherlock Holmes. According to Sherlock, Mycroft is married and has a son. Charles Gray, who played Mycroft in the film The Seven-Per-Cent Solution (1976), also played the character in four episodes of Granada Television's Sherlock Holmes series in the late 1980s and early 1990s. Gray's first two television appearances were adaptations of the two stories in which Mycroft actually appears ("The Greek Interpreter" and "The Bruce-Partington Plans"). In the two other appearances, the character was used to replace another for various reasons. In "The Golden Pince-Nez", Mycroft was used in place of Watson, since Edward Hardwicke was unavailable due to a prior commitment to appear in Shadowlands. In "The Mazarin Stone", Mycroft was used in place of Sherlock owing to Jeremy Brett's ill health.