In this musical comedy, optimistic high school teacher Will Schuester tries to refuel his own passion while reinventing the high school's glee club and challenging a group of outcasts to realize their star potential as they strive to outshine their singing competition while navigating the cruel halls of McKinley High.

Seasons

Season	Episodes	Release date	Rating
Season 1 McKinley High School's Glee Club used to be at the top of the show choir world, but years later, it has turned into a haven for misfits and social outcasts. But at McKinley, things for the Glee Club are about to change. Optimistic high school teacher Will Schuester has offered to take on the Herc…	22	2009-05-19	7.2
Season 2 After a tough loss at Regionals, the glee club is back as the underdogs of McKinley High. When the school is faced with even more budget cuts, Mr. Schuester pushes the kids to help recruit new members for the club. Rachel and Finn disagree on new recruits, including Sam Evans and exchange student…	22	2010-09-21	6.8
Season 3 Season Three follows the Club through the sectional, regional and national show choir competitions, and during nationals they finally take home the winning prize. Season Three also introduced several new characters, such as Sugar Motta, Sebastian Smythe, and the winners of The Glee Project: Rory …	22	2011-09-20	6.7
Season 4 The season introduced several new characters, such as Jake Puckerman, Marley Rose, Kitty Wilde, Hunter Clarington, and winner and runner up of The Glee Project, Ryder Lynn and Betty Pillsbury respectively, it also counts with the return of Unique Adams. New characters were introduced as the plot …	22	2012-09-13	6.5
Season 5 Finding the right note pales in comparison to navigating real life for the members and alums of William McKinley High School's glee club.	20	2013-09-26	6.3
Season 6 The show's final season sees a humbled Rachel return home, Kurt and Blaine at a crossroads and the glee club's future imperiled.	13	2015-01-09	5.7

What's left behind the scenes

Heather Morris (who previously worked as a backup dancer during Beyoncé's tour) was cast in the role of Brittany.
To a large extent, the production featured unknown actors, as the creators of the series had intended. Often, the auditions were attended by young people who had simply walked in off the street to try their luck in cinema.
Darren Criss landed the role of Blaine, although he had originally auditioned for the role of Finn.
For a while, the series unfolded without Brittany's participation, as the actress playing the role, Heather Morris, was expecting a baby.
It was initially intended that Gwyneth Paltrow would appear in only one episode of the second season; however, she was so well-received by both audiences and critics that her role was expanded into subsequent seasons, and the actress won an Emmy Award for her work on the series.
During filming, Kevin McHale would constantly tap his foot to the beat of the music. Several scenes even had to be reshot because the tapping was too loud.
Kevin McHale is the only actor to appear in every single episode from the first through the fourth seasons.
On the day her auditions were scheduled, Lea Michele got into a car accident right outside the studio building. She arrived at the audition while still picking shards of glass from her hair.
Dianna Agron was cast as Quinn after filming had already begun.
Instead of traditional auditions, applicants were required to submit a video of themselves singing; however, Cory Monteith (1982-2013) did not sing, but instead mimed playing the drums. The producers liked the actor so much that they contacted his agent to invite Monteith to Los Angeles for an in-person audition.
The general idea for the series was proposed by producer and screenwriter Ian Brennan, who based it on memories of his own participation in a school choir. Initially, it was intended to be a film rather than a series. Brennan wrote the first draft of the script in August 2005, but producers were not interested at the time. A friend of Brennan's, who worked as a television producer, showed the script to Ryan Murphy, with whom he attended the same gym. Murphy had once sung in a choir himself, so the theme resonated with him. Murphy and Brad Falchuk thought the project would be better as a series, after which the three of them met and set to work rewriting the script. The revised script was submitted to the Fox network, where it was immediately welcomed.
The character of Kurt was written specifically for Chris Colfer, who had originally auditioned for the role of Artie.
Lea Michele was the first actress cast in the series.
Matthew Morrison, who plays William Schuster, is only four years older than Harry Shum Jr. (Mike Chang), Cory Monteith (Finn Hudson), and Mark Salling (Noah Puckerman), who play his students.