"Marvel's Daredevil," which premiered all 13 episodes on the online streaming platform over the weekend, follows blind comic-book hero Matt Murdock, played by British actor Charlie Cox.
Murdock is a lawyer by day and masked vigilante Daredevil by night, fighting criminals in New York's Hell's Kitchen, a neighbourhood destroyed by the explosive climax of 2012's "Avengers" film.
"I felt like this was the next evolutionary step in the Marvel cinematic universe with what they were going to do, and they were going to go grittier and darker," Cox said.
The series follows the level-headed Murdock, blinded as a child in an accident, as he establishes a law practice with his friend Foggy Nelson to help those really in need.
At night, Murdock unleashes his alter-ego Daredevil, using his heightened senses to beat criminals often to a pulp, while getting battered himself as he hunts the villainous Kingpin, Wilson Fisk (Vincent D'Onofrio).
"(Murdock) is Catholic and presumably believes in God and divine order and yet he's playing God in some ways," Cox said. "He goes home and sits with those feelings, and feels that inner conflict and dilemma and that idea of purgatory."
Marvel has dominated the superhero genre with blockbuster films such as "Iron Man" and "Captain America”. The upcoming "Avengers: Age of Ultron" is expected to break box office records next month.
The superheroes have also expanded to television with ABC network's "Agents of S.H.I.E.L.D" and "Agent Carter" mini-series that tie into the films.