X-Men, also known as X-Men: The Animated Series, is an American-Canadian animated television series which debuted on October 31, 1992, in the United States on the Fox Network as part of its Fox Kids Saturday morning lineup. X-Men was Marvel Comics' second attempt at an animated X-Men TV series after the pilot X-Men: Pryde of the X-Men was not picked up.
The show features X-Men similar in look and line-up to the early 1990s X-Men drawn by Jim Lee (more specifically, Cyclops' Blue Team, established in the early issues of the second X-Men comic series), composed of Cyclops, Wolverine, Rogue, Storm, Beast, Gambit, Jubilee, Jean Grey, Professor X, as well as an original character, Morph (an adaptation of previous X-Men member Kevin Sydney).
A number of famous storylines and events from the comics are loosely adapted in the series, such as "The Dark Phoenix Saga", "Days of Future Past", the "Phalanx Covenant", and the "Legacy Virus". The third episode, "Enter Magneto", features a confrontation at a missile base: this is largely based on the X-Men's first battle with Magneto, as told in their 1963 debut The X-Men #1. The season four episodes "Sanctuary, Parts I & II", which involve Magneto creating an orbiting haven for mutants, were influenced by several storylines from the comics, chiefly the first three issues of X-Men (Volume 2) and the "Fatal Attractions" crossover. An Age of Apocalypse-like time-line is shown in the episode "One Man's Worth". The entire saga of the Phoenix is retold and adapted in the third season, subdivided into the five-part "Phoenix Saga", in which Jean acquires the power of the Phoenix and the battle for the M'Kraan Crystal occurs, and the "Dark Phoenix Saga", showcasing the battle with the Hellfire Club, the Phoenix Force's transformation into Dark Phoenix, and the battle to decide her fate. These particular episodes were so closely adapted from their comic counterpart that the episodes have the additional credit, "Based on stories by Chris Claremont".