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Anime and Manga
- Detective Conan: Although not a detective himself, Shinichi Kudo's father is a mystery writer, thus giving Shinichi his detective streak and easy access to the books of Conan Doyle. The fact that he and Shinichi's mother are able to put on a performance that baffles even Shinichi early on, they both clearly have the background to qualify Conan for this trope.
- Death Note: Light Yagami's father is a police inspector and it's mentioned that Light has used his vast intellect to help solve crimes in the past. For this reason, he ends up helping the Kira investigation. Too bad he is Kira...
- Isabel and Rae Spellman of the Spellman Files book series. (David appears to have been brought up to be a PI as well, but he rebelled.)
- Encyclopedia Brown's father was a police detective and amazingly enough all the cases that stumped his entire police force were always solved by his son over dinner.
- Joe & Frank Hardy, who helped their PI father solve cases.
- Or, in some cases (especially where a reward was involved) competed with their PI father.
- Distaff Counterpart Nancy Drew also started this way, although her father was a lawyer, not a detective. She started by doing some low-level work to help him, but slowly evolved into a full-fledged detective (and like Frank and Joe, occasionally went against him when she thought the case didn't all add up.)
- Sherlock Holmes, in the single story where he talks about his family ("The Adventure of the Greek Interpreter"), acknowledges that his observational skills are a family trait, and that his elder brother Mycroft has an even greater share of them than he himself.
- In the pastiche series, Enola Holmes, the title character, who is the far younger sister of Sherlock and Mycroft, runs away and finds that she is no less talented as a detective as her brothers.
- And the tradition continued into at least the late 20th Century with Shirley, Mycroft's Canadian-born great-granddaughter (Or it might have been one of Holmes' other brothers. Sources vary.).
- There's a new series called The Sherlock Files which feature the great-great-great grandchildren.
- Walter "Ramses" Emerson is the son of Amelia Peabody and Radcliffe Emerson, both archeologists and both Amateur Sleuths. He has been detecting with them since he was six or so. Whether they want him to or not. He follows them in both careers, with a side-order of secret agent.
- The Crime Through Time books are a quasi-Generational Saga, following different members of a family of detectives as they solve mysteries in various decades of the 20th and 21st centuries. By the 1920s book, people are pointing out that the protagonist takes after their parents, and by the 2000s book, the family home sports an extensive forensic lab.
Live Action TV
- Veronica Mars, raised by her sheriff-turned-PI dad, was already running her own PI business in High School (it was well-known that the girls loos doubled as 'her office' during school hours). A lawyer-friend of the family would leave cases open on the desk she had at her father's office while he was with clients in case she decided to 'take a look'.
- Emerson Cod of Pushing Daisies (who started out so early, he was being used in stings as a baby)
- Shawn Spencer of Psych was trained by his police officer father to have observational skills on the Sherlock Holmes level. He uses them to pretend he's psychic.
- The Wire:
- Detective McNulty uses his preteen sons trail a drug kingpin through a market, and judging by their skill at it, he's taught a few things about tailing a suspect. While he is a loving father, this is an example of how terrible a person McNulty is at everything but being a detective. His ex-wife is pissed when she finds out and tries to take away his custody rights.
- While not necessarily used about people who actually have been detectives since childhood, the Baltimore cops call anyone whose instincts for policework seem like they've been doing it since they've been in diapers "natural police." McNulty is regularly termed "a natural police" (sic—a Baltimore cop is almost always called "a police"), as is Lester Freamon (after he's allowed to show what he can do).
- He wasn't raised to be a detective, but Monk's neurotic mother probably caused him at least in part to develop the OCD that makes him such a skilled investigator, and the episode "Mr. Monk and Little Monk" revealed that he solved his first (admittedly minor) crime in middle school.
- A mini series called Little Monk was created during its eighth season which shows Adrian and his brother Ambrose serving as his Watson solving several cases in school.
- On Crossing Jordan, Jordan Cavanaugh was a crime-solving medical examiner whose father, Max, was a retired cop.
- Both Deb and Dexter are cops, as was their father, Harry. Played with, in that Dexter is actually Harry's adopted son (and a serial killer). And not actually a cop, but a forensic analyst.
- Persona 4´s Naoto Shirogane, who is the fifth generation in a family of professional detectives.
- The Touch Detective series shows Mackenzie as this, but still in the Kid Detective phase.
- Kyoko Kirigiri from Dangan Ronpa. Her family, the Kirigiri, are a family of top detectives, and even before she realized her title being "Super High-School Level Detective", she tremendously helped out the protagonist Naegi with her deductive and investigation skills befitting of a detective.
- Also Shuichi Saihara from New Dangan Ronpa V3, whose uncle was a private investigator which Shuichi often helped to show gratitude for taking care of him. He worked on several cases before solving the homicide that granted him the title of Ultimate Detective.
- Inspector Gadget's niece Penny would likely have grown up to be one of these, after all the practice she had "helping" her uncle solve his cases. Subverted, in that Gadget was chiefly useless and Penny did most of the work.