13 Reasons Why (stylized onscreen as TH1RTEEN R3ASONS WHY) is an American mystery teen drama web television series based on the 2007 novel Thirteen Reasons Why by Jay Asher and adapted by Brian Yorkey for Netflix. The series revolves around a high school student, Clay Jensen, and his friend Hannah Baker, a girl who committed suicide after suffering a series of demoralizing circumstances brought on by select individuals at her school. A box of cassette tapes recorded by Hannah before her suicide details thirteen reasons why she ended her life.
Yorkey and Diana Son serve as showrunners on the series. The first season consists of thirteen episodes. The series is produced by July Moon Productions, Kicked to the Curb Productions, Anonymous Content and Paramount Television. Originally conceived as a film set to be released by Universal Pictures with Selena Gomez in the role of Hannah Baker, the adaptation was picked up as a television series by Netflix in late 2015. Gomez serves as an executive producer. The first season, and the special 13 Reasons Why: Beyond the Reasons, were released worldwide on Netflix on March 31, 2017.