The third season of the FLCL anime series, titled FLCL Alternative, is produced by Production I.G, Toho, and Adult Swim's production arm Williams Street. Alternative was chief directed by Katsuyuki Motohiro and co-directed by Yutaka Uemura, with screenplay by Hideto Iwai. It originally aired from September 8 to October 13, 2018 in the United States on Adult Swim's Toonami programming block. However, the first episode of the season aired unannounced in Japanese audio with English subtitles as part of Adult Swim's April Fools' stunt back on April 1, 2018. In Japan, Alternative received a theatrical screening as a compilation film, with it opening on September 7, 2018. In addition to providing several tracks for the season, the Pillows performed the ending theme song "Star overhead".

Production I.G, Inc. is a Japanese animation studio and production enterprise. Headquartered in Musashino, Tokyo Production I.G was founded on December 15, 1987, by producer Mitsuhisa Ishikawa and character designer Takayuki Goto as "I.G Tatsunoko", a branch studio of the animation giant Tatsunoko Production, changing its name to the current Production I.G in September 1993. The letters I and G derive from the names of the company founders. Since 2007, Production I.G is a subsidiary of the IG Port holding company. Ishikawa was president and CEO of the studio until August 2022 when that position was given to George Wada with Ishikawa remaining as chairman of the company.