Sherlock Holmes in the context of "Magnifying glass"

Batman is a superhero who appears in American comic books published by DC Comics. Batman was created by artist Bob Kane and writer Bill Finger, and debuted in the 27th issue of the comic book Detective Comics on March 30, 1939. In the DC Universe, Batman is the alias of Bruce Wayne, a wealthy American playboy, philanthropist, and industrialist who resides in the fictional Gotham City. His origin story features him swearing vengeance against criminals after witnessing the murder of his parents, Thomas and Martha, as a child, a vendetta tempered by the ideal of justice. He trains himself physically and intellectually, crafts a bat-inspired persona, and monitors the Gotham streets at night. Kane, Finger, and other creators accompanied Batman with supporting characters, including his sidekicks Robin and Batgirl; allies Alfred Pennyworth and James Gordon; love interest and occasional adversary Catwoman; as well as foes such as the Penguin, the Riddler, Two-Face, and his archenemy, the Joker.

Kane conceived Batman in early 1939 to capitalize on the popularity of Superman; although Kane frequently claimed sole creation credit, Finger substantially developed the concept from a generic superhero into something more bat-like. They drew inspiration from pulp fiction characters like the Shadow, Sherlock Holmes, and the Green Hornet. Batman received a spin-off publication, Batman, in 1940. Kane and Finger introduced Batman as a ruthless vigilante who frequently killed or maimed criminals, but he evolved into a just, tempered superhero with a stringent moral code that prohibits killing during the 1940s. Unlike most superheroes, Batman does not possess any superpowers, instead relying on his intellect, fighting skills, and wealth. The 1960s Batman television series used a camp aesthetic, which continued to be associated with Batman for years after it ended. Various creators worked to return Batman to his darker roots in the 1970s and 1980s, culminating with the 1986 miniseries The Dark Knight Returns by Frank Miller.

Detective fiction is a subgenre of crime fiction and mystery fiction in which an investigator or a detective—whether professional, amateur or retired—investigates a crime, often murder. The detective genre began around the same time as speculative fiction and other genre fiction in the mid-nineteenth century and has remained extremely popular, particularly in novels. Some of the most famous heroes of detective fiction include C. Auguste Dupin, Sherlock Holmes, Kogoro Akechi, Miss Marple and Hercule Poirot. Juvenile stories featuring The Hardy Boys, Nancy Drew, and The Boxcar Children have also remained in print for several decades.

Crime fiction, detective story, murder mystery, crime novel, mystery novel, and police novel are terms used to describe narratives or fiction that centre on criminal acts and especially on the investigation, either by an amateur or a professional detective, of a crime, often a murder. Most crime drama focuses on criminal investigation and does not feature the courtroom. Suspense and mystery are key elements that are nearly ubiquitous to the genre.

It is usually distinguished from mainstream fiction and other genres such as historical fiction and science fiction, but the boundaries are indistinct. Crime fiction has several subgenres, including detective fiction (such as the whodunit), courtroom drama, hard-boiled fiction, and legal thrillers.

Gregory House is a fictional character and the titular protagonist of the American medical drama series House. Created by David Shore and portrayed by English actor Hugh Laurie, he leads a team of diagnosticians and is the Head of Diagnostic Medicine at the fictional Princeton-Plainsboro Teaching Hospital in Princeton, New Jersey. House's character has been described as a misanthrope, cynic, narcissist, and curmudgeon.

In the series, the character's unorthodox diagnostic approaches, radical therapeutic motives, and stalwart rationality have resulted in much conflict between him and his colleagues. House is also often portrayed as lacking sympathy for his patients, a practice that allows him time to solve ethical enigmas. The character is partly based on Sherlock Holmes. A portion of the show's plot centers on House's habitual use of Vicodin to manage pain stemming from leg infarction involving his quadriceps muscle some years earlier, an injury that forces him to walk with a cane. This dependency is also one of the many parallels to Holmes, who is portrayed as being a habitual user of cocaine and other drugs.

A red herring is something that misleads or distracts from a relevant or important question. It may be either a logical fallacy or a literary device that leads readers or audiences toward a false conclusion. A red herring may be used intentionally, as in mystery fiction or as part of rhetorical strategies (e.g., in politics), or may be used in argumentation inadvertently.

The term was popularized in 1807 by English polemicist William Cobbett, who told a story of having used a strong-smelling smoked fish to divert and distract hounds from chasing a rabbit.

In literature, an archenemy (sometimes spelled as arch-enemy) or nemesis is the main enemy of the protagonist—or sometimes, one of the other main characters—appearing as the most prominent and most-known enemy of the hero.

The Strand Magazine was a monthly British magazine founded by George Newnes, composed of short fiction and general interest articles. It was published in the United Kingdom from January 1891 to March 1950, running to 711 issues, though the first issue was on sale well before Christmas 1890.Its immediate popularity is evidenced by an initial sale of nearly 300,000. Sales increased in the early months, before settling down to a circulation of almost 500,000 copies a month, which lasted well into the 1930s.

It was edited by Herbert Greenhough Smith from 1891 to 1930. The popularity of Sherlock Holmes became widespread after first appearing in the magazine in 1891. The magazine's original offices were on Burleigh Street off The Strand, London. It was revived in 1998 as a quarterly magazine.

A supporting character, also known as a side character, is a character in a narrative that is not the focus of the primary storyline, but is important to the plot/protagonist, and appears or is mentioned in the story enough to be more than just a minor character or a cameo appearance. Supporting characters differ from minor characters because they have complex backstory of their own, desires, and emotions. While this is usually in relation to the main character, rather than entirely independently, developed supporting characters add layers and dimension to the story and the protagonist. These back stories can increase the plot or further develop the main character. Different supporting characters have different roles. Some common types of supporting characters include: love interest, antagonist, best friend, mentor, sidekick, comic relief, and caregiver. Each supporting character has their own role that advances the plot and brings about conflict. Often, supporting characters can cross over into different tropes. Some examples of well-known supporting characters include Watson in the Sherlock Holmes stories, Donkey in the Shrek films, and Ron Weasley in the Harry Potter franchise. No matter what type of supporting character, they all help the protagonist achieve their purpose, advance the story, or have personal growth. Supporting characters fit into three broad categories: supporters, antagonists, and informants.

Supporters include caregivers, love interests, comedic relief, and close friends. They are generally important to the protagonist, so they often become the target or victim to the antagonist. They also characterize the protagonist through dialogue and their relationship. They offer the protagonist aid, companionship, and physical or emotional help. Ron Weasley and Hermione Granger in the Harry Potter series are examples of supporters.

Mystery is a fiction genre where the nature of an event, usually a murder or other crime, remains mysterious until the end of the story. Often within a closed circle of suspects, each suspect is usually provided with a credible motive and a reasonable opportunity for committing the crime. The central character is often a detective (such as Sherlock Holmes), who eventually solves the mystery by logical deduction from facts presented to the reader. Some mystery books are non-fiction. Mystery fiction can be detective stories in which the emphasis is on the puzzle or suspense element and its logical solution such as a whodunit. Mystery fiction can be contrasted with hardboiled detective stories, which focus on action and gritty realism.

Mystery fiction can involve a supernatural mystery in which the solution does not have to be logical and even in which there is no crime involved. This usage was common in the pulp magazines of the 1930s and 1940s, whose titles such as Dime Mystery, Thrilling Mystery, and Spicy Mystery offered what were then described as complicated to solve and weird stories: supernatural horror in the vein of Grand Guignol. That contrasted with parallel titles of the same names which contained conventional hardboiled crime fiction. The first use of "mystery" in that sense was by Dime Mystery, which started out as an ordinary crime fiction magazine but switched to "weird menace" during the later part of 1933.