The members of New Directions head to Regionals to face off against the Warblers

Substitute Holly Holliday fills in for the sex ed teacher and helps Mr. Schuester teach New Directions about the birds and the bees; Emma and Dr. Carl address some issues in their personal life.

The glee club is personally touched when Principal Figgins addresses the dangers of underage drinking; Mr. Schuester and Coach Beiste indulge in some fun.

Brittany helps Rachel try to launch her social comeback; Sam starts a tribute band.

The glee club prepares a kissing booth for Valentine's Day; hearts are broken when plans go awry.

Coach Bieste and Mr. Schuester plot to bring the warring glee club and football team together; Sue desperately tries to win cheerleading Nationals; New Directions tackles Michael Jackson's ``Thriller.''

After learning of Emma's love of the film, Will has the glee club perform ``The Rocky Horror Picture Show'' for the school's annual musical.

Finn and Rachel plan to throw the competition so Sam can win when club members are assigned duets; Mike, Tina and Artie find themselves in a love triangle.

Finn thinks he sees Jesus' face in his grilled cheese; Kurt has a crisis that leads to a discussion about theology.

When Brittany and the gang try to convince Mr. Schuester to let them do a Britney Spears number, he is reluctant to go that edgy. Meanwhile, an insecure Will is curious about Emma’s new beau, Dr. Carl Howell (guest star Stamos), so he convinces her to bring him in to talk to the kids about dental hygiene.

After a tough loss at regionals, the glee club returns as the underdogs of McKinley High; Mr. Schuester pushes the students to recruit new members; Rachel and Finn disagree on new recruits.