|Season 1, Episode 13|
|Air Date||December 9, 2009|
Sectionals is the thirteenth episode of season one. It aired on December 9, 2009.
Rachel, through intuition and observation of the relationship between Quinn and Puck, finds out Finn is not the actual father of Quinn's baby, and that Quinn has been lying. She tells Finn the truth. This causes Finn to beat up Puck, dump Quinn, and quit glee, furious at everyone in glee for not telling him (as everyone except him and Rachel had known beforehand). During Sectionals he returns to the group, and Rachel offers her helping hand to support to him.
Finn returns to Glee to help out at Sectionals and tells Rachel that it's time for her to take the spotlight and perform. He shares a smile with her and jokingly says "Don't screw it up."