Question: Which Marvel Comics character with severe mental illnesses appear in the pilot episode of the American cable television series named after the character?
Context: Legion (David Charles Haller) is a fictional superhero appearing in American comic books published by Marvel Comics.  He is the mutant son of Professor Charles Xavier and Gabrielle Haller.  Legion takes the role of an antihero who has a severe mental illness including a form of dissociative identity disorder, in which each of his alternate personas controls one of his many superpowers. "Legion" is an American cable television series created for FX by Noah Hawley, based on the Marvel Comics character David Haller / Legion.  It is connected to the "X-Men" film series, the first television series to do so.  The first season, consisting of eight episodes, began airing on February 8, 2017.  A second season was ordered in March 2017. Ang Panday or simply Panday (lit.  "The Blacksmith") is a fantasy television series that was aired in the Philippines by ABS-CBN.  The pilot episode of the first book ("Panday: Unang Yugto") aired on November 7, 2005 replacing "Ikaw ang Lahat sa Akin" and ended with its last episode on December 9, 2005.  The second book ("Panday: Ang Ikalawang Yugto") aired its pilot episode on April 3, 2006 and ended with the series finale on May 26, 2006.  The series is based on the fictional comics character of the same name, which was created by Carlo J. Caparas and illustrated by Steve Gan. Legion is an American cable television series created for FX by Noah Hawley, based on the Marvel Comics character David Haller / Legion.  It is connected to the "X-Men" film series, the first television series to be so, and is produced by FX Productions in association with Marvel Television.  Hawley serves as showrunner on the series. The first season of the American cable television series "Legion" is based on the Marvel Comics character David Haller / Legion, a mutant diagnosed with schizophrenia at a young age, who learns that his illness may actually be abilities.  The season is connected to the "X-Men" film series, and was produced by FX Productions in association with Marvel Television.  Noah Hawley served as showrunner. "Chapter 1" is the pilot episode of the American cable television series "Legion", based on the Marvel Comics character David Haller.  The episode is connected to the "X-Men" film series, the first television episode to do so, and follows Haller, who believes himself to be schizophrenic until he is interrogated by government agents who think he may be the most powerful mutant discovered.  The episode was written and directed by Noah Hawley. Marvel's Cloak & Dagger, or simply Cloak & Dagger, is an upcoming American cable television series created for Freeform by Joe Pokaski, based on the Marvel Comics characters of the same name.  It is set in the Marvel Cinematic Universe (MCU), sharing continuity with the films and other television series of the franchise.  The series is produced by ABC Signature Studios and Marvel Television, with Pokaski serving as showrunner. "Dominion" is an American apocalyptic supernatural action television series created by Vaun Wilmott.  It is loosely based on the 2010 film "Legion", written by Peter Schink and Scott Stewart.  In December 2013, Syfy ordered a pilot episode and the series premiered on the American cable television network Syfy on June 19, 2014.  The show is filmed in Cape Town, South Africa.  Stewart serves as series executive producer, as well as director of the pilot episode, written by Wilmott. Ballers is an American comedy-drama television series created by Stephen Levinson and starring Dwayne Johnson.  The series premiered on the American cable television network HBO on June 21, 2015.  The pilot episode was written by Levinson and directed by Peter Berg.  The series' third season premiered in July 2017, and on August 8, 2017, HBO picked up "Ballers" for a fourth season, which is set to premiere in 2018. Dominion is an American apocalyptic supernatural action television series created by Vaun Wilmott.  It is loosely based on the 2010 film "Legion", written by Peter Schink and Scott Stewart.  In December 2013, Syfy ordered a pilot episode and the series premiered on the American cable television network Syfy on June 19, 2014.  The show was filmed in Cape Town, South Africa.  Stewart served as series executive producer, as well as director of the pilot episode, written by Wilmott.
Answer: Legion