Daredevil
Matt Murdock, the son of prize-fighter Jack Murdock, was shocked to discover that his father had worked a deal with Wilson Fisk, the Kingpin of Crime. Running from his father in shame, the devastated youth was almost killed by a chemical truck hauling radioactive waste, which splashed into his eyes and blinded him. His father swore revenge against the Kingpin, for it was the Kingpin's truck that had almost killed Matt; however, the crime lord learned of Jack's intentions and had him killed before he could reveal the information to the authorities, for it was illegal to carry radioactive waste in New York.
Wanting revenge on the Kingpin, much as his late father, Matt discovered that his blindness somehow heightened his senses to a near-supernatural level, allowing him to navigate with ease in even the most unfamiliar environments.
Training with his mentor, a man known only as 'Stick', Matt took on the identity of Daredevil, the Man Without Fear, a vigilante who fought crime and whose primary priority was to defeat the Kingpin and bring down his criminal empire. Taking up the legal profession of an attorney, Murdock moved to New York's 'Hell's Kitchen', a dingy, drug-strewn ghetto, bringing Daredevil's fight for justice to the place where justice was needed most.
Matt Murdock eventually took on a *very* famous client: Peter Parker, otherwise known as Spider-Man, whom the Kingpin had set up. Teaming up to clear both Parker and Spider-Man's names, Daredevil vowed to Spider-Man, who he revealed to him that Wilson Fisk was the Kingpin, that he would not rest until the Kingpin was brought to justice. Though the Kingpin himself escaped, Daredevil still roams the rooftops and alleys of Hell's Kitchen, making certain that the corrupt never again pray on the weak.
The Daredevil character only made two appearances in the series: first, in the two-part third-season episode, Framed, and then in The Man Without Fear; despite his infrequent appearance in the series, he has an important role in the Kingpin's past, and even revealed the Kingpin's true identity to Spider-Man, for in the past episodes, Spider-Man never knew Fisk was the Kingpin, hence, making his appearance a grand turning point in the series.
Read more about this topic: List Of Spider-Man (1994 TV Series) Characters, Heroes and Allies