In Mycroft's opinion, Sherlock has "the mind of philosopher or scientist, yet he elects to be a detective". Sherlock states the highest compliment he can give is saying that Mary deserves John as a husband. He is Sherlock's older brother and engages in sibling rivalry with Sherlock. She understands both of them very well and respects their close, brotherly friendship; during "In "The Six Thatchers," Mary gives birth to her and John's daughter, whom they name Rosamund (which is revealed to be her real first name).
With her protection gone, Irene was left to the mercy of any who were after her. At the conclusion of the third episode "The Final Problem," John receives another posthumous DVD from Mary, in which she notes that the two of them are - basically - a junkie who solves crime to get high and a doctor who never came back from the war, but that what truly matters is that the two of them maintain the "last refuge for the desperate" at 221B Baker Street. His father sighs and looks a bit annoyed, but remains polite.

The first series was initially broadcast in July and August 2010 on the BBC, later premiering on After the high ratings for "A Study in Pink", the BBC was reportedly eager to produce more episodes.The synopsis for the episode reads "Sherlock has been gone for two years.

However, in the closing moments of the third-season finale, "Moriarty appears briefly in some of the fourth series episodes. He is once seen stretched out on his chair and firing a gun at a smiley face spray-painted on the wall in his flat.

Mycroft Holmes (played by the show's executive producer, co-creator, and writer Mark Gatiss) is first introduced when he abducts John and offers to pay him to spy on Sherlock. Sherlock (TV Series 2010–2017) cast and crew credits, including actors, actresses, directors, writers and more. Though it was reported she was beheaded by extremists in Karachi some time later, Sherlock had helped her fake her death. Mary smiles as she reflects that they will always be her "Baker Street Boys," answering the strange cases that nobody else can solve when people truly need help. He is willing to use deadly force and shows impressive physical strength; in the episode Much to John's constant annoyance, he is often mistaken for a The only member of John's family who has been alluded to thus far is his sister, Harriet (aka Harry), with whom he has an estranged relationship due to her being a John' middle name is revealed to be Hamish, as originally suggested by By the fourth season, Sherlock and Lestrade's relationship, while still strained, has become notably better, as Sherlock's interaction with John helps him be a better person. 'Detective Inspector,', the Lestrade in the original novels was ranked as Inspector (the rank of 'DI' not having been created at that time.) His intellect is borderline superhuman, allowing him to learn Despite not paying John like he originally suggested, Mycroft is kept informed of anything his brother does that may be illegal, as seen in “Mycroft knows his brother well, saying Sherlock considers himself a dragon-slayer; the villains Sherlock catches are the equivalent of dragons.

In the third season, he has become one of Sherlock's most avid fans, the founder of "The Empty Hearse", a club which believes Sherlock to have faked his death during the events of "The Reichenbach Fall", and a rather avid conspiracy theorist regarding his fall. But someone isn't quite convinced that he's dead. He refuses Mycroft's offer to pay him to spy on Sherlock, despite only having just met Sherlock; however, Series 3 shows John informing Mycroft of anything wrong Sherlock has done, showing he will inform others of Sherlock's actions if they are family. As he stands between them, working on this visual aid, his mother simply looks up at him and continues talking as if she does not even notice his unusual behavior.
She seems to know how to get what she wants from both John and Sherlock.

Molly was originally intended to be a one-off character to introduce Sherlock, but Brealey impressed Moffat and Gatiss and they "couldn’t resist bringing her back".He is an excellent actor, frequently shown to have convinced others that he is someone else – indeed his first appearance occurs as a In the second series, he continues in his role as consulting criminal, giving Moriarty features extensively in the second series finale "The Reichenbach Fall", where he simultaneously breaks into the Moriarty appears in the third series in either flashbacks, alternative scenarios, or Sherlock's "mind palace" vignettes.

Upon her change of heart, the two rescue Watson, and together they return to Sherrinford, where she is reinstitutionalized. After Sherlock reveals that he's going against Magnussen, Anderson is threatened by Mycroft into never speaking of what he heard.

Although Holmes follows Mary's 'advice' by putting himself in a dangerous situation that John will have to rescue him from, John only moves to save Sherlock when he finds the DVD himself and realizes what his friend is doing, musing in the aftermath that he is not the man Mary believed he was even if he wants to be. Eurus continues the game, this time with Watson's life on the line. Mr. and Mrs. Holmes also appear later in Series Three, in " She also claims that "who you really are, it doesn’t matter."