Season One

Season One of OTTHTD first aired on September 21, 2004, four months after the Pilot was broadcast on May 19, 2004.

The series focuses on a high school Glee Club called the New Directions, set within the fictional William McKinley High School in Lima, Ohio.

Major themes of Season One included the characters' desires to escape the confines of small-town Ohio life and make an impact on the world rather than remaining a "Lima Loser." Many of the story arcs, most notably Quinn's pregnancy and the New Directions' rivalry with Carmel High's Glee Club Vocal Adrenaline, are related to this concept. The other major motif of season one was the characters concealing and revealing their true selves. This includes major events like the blossoming romance between Finn and Rachel, Quinn's lies about her child's father, Kurt's coming out, and Terri's fake pregnancy.

Main Cast

 * Nick Cataldo as Kitty Wide
 * Zachary Lord John Bolton
 * Dianna Agron as Quinn Fabray
 * Chris Colfer as Kurt Hummel
 * Kevin McHale as Artie Abrams
 * Lea Michele as Rachel Berry
 * Cory Monteith as Finn Hudson
 * Matthew Morrison as Will Schuester
 * Amber Riley as Mercedes Jones
 * Mark Salling as Noah Puckerman
 * Jenna Ushkowitz as Tina Cohen-Chang
 * Jane Lynch as Sue Sylvester
 * Jayma Mays as Emma Pillsbury

Major Events

 * Finn and Quinn relationship, Finn and Rachel relationship, and Quinn and Puck relationship, and thus arising the Finn/Quinn/Rachel love triangle and Finn/Puck/Quinn love triangle.
 * Quinn's teen pregnancy. She insists that Finn is the father, but it's actually Puck.
 * Rachel's feelings for Finn.
 * Rachel meeting her biological mother, Shelby.
 * Rachel and Jesse relationship and Finn/Jesse/Rachel love triangle. Jesse joining New Directions, then abruptly quitting.
 * Will bringing in members and keeping the team together in the first half.
 * Terri's fake pregnancy leading to Will and Terri's divorce.
 * Will and Emma relationship.
 * Ken and Emma's failed wedding plan.
 * Kurt coming to terms with his sexuality.
 * Kurt and his relationship with his father, Burt, about his sexuality.
 * Kurt's feelings for Finn.
 * Kurt arranges Burt and Carole relationship to make him closer to Finn.
 * The relationship of Tina and Artie.
 * The friendship of Kurt and Mercedes.
 * Kurt and Mercedes join the Cheerios, leading Mercedes to not being herself. Puck takes advantage of Mercedes' new popularity after he shaves his mohawk, creating Puck and Mercedes relationship.
 * Will and Sue's rivalry.
 * New Directions and Vocal Adrenaline rivalry.
 * New Directions lose Regionals, but are given another year thanks to Sue.