While Glee faced declining ratings and criticism in its later seasons, it enjoyed enormous success in its early years.

Co-created and executive produced by Ryan Murphy, the series followed a show choir of misfit teenagers at William McKinley High School in Lima, Ohio as they navigated competitions and personal crises.

Starring Matthew Morrison as the club’s coach Will Schuester, Lea Michele as high school performer Rachel Berry, and Jane Lynch as cheerleader coach Sue Sylvester, the show was praised for its exploration of topics of such as sexuality, race and bullying at a time when representation was sparse in the TV landscape.

Other cast members included Dianna Agron, Amber Riley, Chris Colfer, Kevin McHale, Jenna Ushkowitz, Heather Morris, Darren Criss, and Chord Overstreet, who became household names as the series grew in popularity.

The show went on to launch a reality competition series, live tours, a 3D movie and several successful cover singles, and also helped establish Murphy, who is behind this month’s Netflix hits Monster: The Jeffrey Dahmer Story and The Watcher, as one of the most prolific TV creators in the industry.

This new Discovery+ docuseries delves into the many controversies behind the hit show Glee