Marvel's The Defenders is an American television miniseries created by Douglas Petrie and Marco Ramirez for the streaming service Netflix, based on the Marvel Comics characters Daredevil, Jessica Jones, Luke Cage, and Iron Fist, who form the eponymous superhero team. It is set in the Marvel Cinematic Universe (MCU), sharing continuity with the franchise's films. The miniseries is a crossover event and the culmination for four previously released interconnected series from Marvel and Netflix. It was produced by Marvel Television in association with ABC Studios, Nine and a Half Fingers, Inc., and Goddard Textiles, with Ramirez serving as showrunner.

Iron Fist is a fictional character appearing in American comic books published by Marvel Comics. Created by Roy Thomas and Gil Kane, Iron Fist first appeared in Marvel Premiere #15. The character is a practitioner of martial arts and the wielder of a mystical force known as the Iron Fist, which allows him to summon and focus his chi. This ability is obtained from the city of K'un-Lun, which appears on Earth every 10 years.