Question: Mike Chang has appeared on Glee since an episode that premiered on what network?

Context paragraphs:
Grilled Cheesus: "Grilled Cheesus" is the third episode of the second season of the American television series "Glee", and the twenty-fifth episode overall.  It was written by Brad Falchuk, directed by Alfonso Gomez-Rejon, and premiered on the Fox network on October 5, 2010.  Prior to its broadcast, series co-creator Ryan Murphy predicted the episode would be "Glee"'s most controversial, as it focuses on religion and what God means to the members of the glee club.  When Burt Hummel (Mike O'Malley) has a heart attack, the glee club rally around his son Kurt (Chris Colfer), attempting to support the Hummels through their various faiths.  Meanwhile, club co-captain Finn Hudson (Cory Monteith) believes he has found the face of Jesus in a grilled cheese sandwich.

Burt Hummel: Burt Hummel is a fictional character from the Fox musical comedy-drama series "Glee".  The character is portrayed by actor Mike O'Malley, and first appeared on "Glee" in the fourth episode of the first season, "Preggers".  Burt was developed by "Glee" creators Ryan Murphy, Brad Falchuk and Ian Brennan.  He is the father of gay glee club member Kurt Hummel (Chris Colfer), and works as a mechanic in Lima, Ohio where the series is set.  He eventually begins a relationship with Carole Hudson (Romy Rosemont), the mother of another glee club member, and the two marry in the second season episode "Furt".  In the third season, Burt runs in a special congressional election and wins.  O'Malley was a recurring cast member during the first season, and was upgraded to a series regular for the second season of the show, but returned to the recurring cast for the third season.

Mike Chang (fitness trainer): Mike Chang (), (Born November 30, 1982) is a professional fitness trainer and founder of the popular Six Pack Shortcuts brand which has generated over 4.3 million subscribers on YouTube.

Sectionals: "Sectionals" is the thirteenth episode of the American television series "Glee".  It premiered on the Fox network on December 9, 2009.  The episode was written and directed by series co-creator Brad Falchuk, and serves as the mid-season finale for the show's first season.  "Sectionals" sees the glee club win the sectionals round of competition, advancing on to regionals.  Glee club member Finn (Cory Monteith) discovers he is not the father of his girlfriend Quinn's (Dianna Agron) baby.  Football coach Ken Tanaka (Patrick Gallagher) plans his wedding with Emma (Jayma Mays) on the same day as the sectionals competition.  Will Schuester (Matthew Morrison) is unable to take the students to sectionals and Emma offers to take them.  The episode sees the return of Eve and Michael Hitchcock as rival glee club directors Grace Hitchens and Dalton Rumba.

Asian F: "Asian F" is the third episode of the third season of the American musical television series "Glee", and the forty-seventh overall.  Written by series co-creator Ian Brennan and directed by Alfonso Gomez-Rejon, it first aired on Fox in the United States on October 4, 2011.  The episode features the introduction of Emma Pillsbury's (Jayma Mays) and Mike Chang's (Harry Shum, Jr.) parents, and the final auditions for the McKinley High production of "West Side Story", in which the competition between Mercedes Jones (Amber Riley) and Rachel Berry (Lea Michele) leads the former to quit New Directions.

Mike Chang: Michael "Mike" Robert Chang, Jr. is a fictional character from the Fox musical comedy-drama series "Glee".  The character is portrayed by actor and dancer Harry Shum, Jr., and has appeared on "Glee" since the fourth episode in the first season, "Preggers", first broadcast on September 23, 2009.  "Glee" follows the trials of the New Directions glee club at the fictional William McKinley High School in the town of Lima, Ohio, of which Mike is a member.  He is introduced as a football player who joins the club together with a few of his teammates, and quickly shows himself to be an excellent dancer.

Harry Shum Jr.: Harry Shum Jr. (born April 28, 1982) is a Costa Rican-American actor, dancer, singer and choreographer.  He is best known for his roles as Mike Chang on the Fox comedy-drama series "Glee" and as Magnus Bane on the Freeform fantasy series "Shadowhunters".  He has appeared in the films "" (2008), "Step Up 3D" (2010), "White Frog" (2012), "Revenge of the Green Dragons" (2014), and "" (2016), and portrayed Elliot Hoo in the web series "The Legion of Extraordinary Dancers".

Preggers: "Preggers" is the fourth episode of the American television series "Glee".  The episode premiered on the Fox network on September 23, 2009, and was written and directed by executive producer Brad Falchuk.  "Preggers" sees glee club member Kurt (Chris Colfer) join the football team and admit his homosexuality to his father, Burt (Mike O'Malley).  Cheerleader Quinn (Dianna Agron) discovers she is pregnant and tells her boyfriend Finn (Cory Monteith) the baby is his, when in fact the father is his best friend Puck (Mark Salling).  Faculty members Sue Sylvester (Jane Lynch) and Sandy Ryerson (Stephen Tobolowsky) team up in an effort to bring down the glee club, luring away a disillusioned Rachel (Lea Michele), who quits when club director Will (Matthew Morrison) refuses to award her a solo song.  This episode features the first appearance of O'Malley as Burt Hummel.

Finn Hudson: Finn Hudson is a fictional character from the Fox musical comedy-drama series "Glee".  The character was portrayed by Cory Monteith and first appeared on television when "Glee" initially premiered its pilot episode on Fox on May 19, 2009.  Finn was developed by "Glee" creators Ryan Murphy, Brad Falchuk, and Ian Brennan.  "Glee" follows the trials of the New Directions glee club at the fictional William McKinley High School in the town of Lima, Ohio.  Finn is initially the quarterback of his high school football team.  A popular jock at the top of the school's social hierarchy, when he finds himself forced to join the school's glee club, he discovers that he loves it, although he risks alienation from his friends by remaining a member.  His storylines see him struggle with his decision to stay in the club, which is at the bottom of the social ladder, while he maintains his popular reputation and the respect of the other jocks.  The character has dealt with his attraction to both head cheerleader Quinn Fabray (Dianna Agron) and glee club star singer Rachel Berry (Lea Michele), the series' female lead.  Following Monteith's death on July 13, 2013, it was announced that Finn's own death would occur in the third episode of the fifth season, titled "The Quarterback".

Lauren Zizes: Lauren Zizes is a recurring fictional character from the Fox musical comedy-drama series, "Glee".  The character is portrayed by actress Ashley Fink, and has appeared in "Glee" since the season one episode "Wheels", first broadcast on November 11, 2009.  Lauren was developed by "Glee" creators Ryan Murphy, Brad Falchuk, and Ian Brennan.  She is a member of New Directions, the glee club at the fictional William McKinley High School in Lima, Ohio, where the show is set.  Her storylines have seen her interact with other members of the glee club and form a relationship with Noah Puckerman (Mark Salling).  Lauren is also the president of the AV club, and a member of the school's wrestling team.  She joins the glee club in the show's second season, putting her in close contact with some of the shows main characters.

Supporting paragraphs: Mike Chang Preggers
Answer: Fox