Daredevil is a fictional superhero appearing in American comic books published by Marvel Comics. Daredevil was created by writer-editor Stan Lee and artist Bill Everett, with an unspecified amount of input from Jack Kirby. The character first appeared in Daredevil #1 (April 1964). Writer/artist Frank Miller's influential tenure on the title in the early 1980s cemented the character as a popular and influential part of the Marvel Universe. Daredevil is commonly known by such epithets as the "Man Without Fear" and the "Devil of Hell's Kitchen".

Daredevil's origins stem from a childhood accident that gave him special abilities. While growing up in the historically gritty or crime-ridden working class Irish-American neighborhood of Hell's Kitchen in New York City, Matt Murdock is blinded by a radioactive substance that falls from a out-of-control truck after he pushes a man out of the path of the oncoming vehicle. While he no longer can see, his exposure to the radiactive material heightens his remaining senses beyond normal human ability, and gives him a "radar sense." His father, a boxer named Jack Murdock, is a single man raising his now blind son. Jack is later killed by gangsters after refusing to throw a fight, leaving Matt an orphan. Some years later, after donning a yellow and dark red costume (which he soon changes to all dark red), Matt seeks out revenge against his father's killers as the superhero Daredevil, fighting against his many enemies, including Bullseye and Kingpin. He also becomes a lawyer after having graduated from Columbia Law School with his best friend and roommate, Franklin "Foggy" Nelson.

Daredevil has since appeared in various forms of media, including several animated series, video games and merchandise. The character was first portrayed in live action by Rex Smith in the 1989 television movie The Trial of the Incredible Hulk, and then by Ben Affleck in the 2003 film Daredevil. Most recently Daredevil was portrayed by Charlie Cox in the Marvel Television productions Daredevil and The Defenders on Netflix for the Marvel Cinematic Universe.

Bullseye is a fictional character appearing in American comic books published by Marvel Comics. A psychopathic assassin, Bullseye uses the opportunities afforded by his line of work to exercise his homicidal tendencies and to work out his own personal vendetta against Daredevil. He is also an enemy of the Punisher. Although he possesses no superpowers, Bullseye is able to use almost any object as a lethal projectile, be it weapons like shuriken and sai or seemingly harmless objects like playing cards and pencils. His marksmanship is uncanny, at a nearly supernatural level.