In the Season Three finale, graduation is finally here, as McKinley High’s class of 2012 looks to the past and present, while contemplating the future.

Link #2 Link #3 Part 2 of 2. The New Directions perform at Nationals for celebrity judge Lindsay Lohan (guest-starring as herself), in an all-new special two-hour “Props/Nationals” episode of GLEE.

Link #2 Link #3 Part 1 of 2. As the countdown to graduation continues, the kids of New Directions prepare a high-concept routine for Nationals. When Tina bumps her head, the world of New Directions is turned upside down in her eyes.

Link #2 Link #3 Brittany goes into high gear as class president to spearhead the prom. Then, after prom king and queen nominations are announced, the kids kick into campaign mode, and some of the outcasts organize a rival celebration.

Rachel and Kurt finally get their chance to audition for the New York Academy of the Dramatic Arts. Meanwhile, Puck makes a decision about his future after a meeting with his father.

Link #2 Link #3 The glee club pays homage to a true icon when they cover Whitney Houston’s greatest hits. Meanwhile, Emma and Will are one step closer to their dream wedding.

Link #2 Link #3 Much to Blaine’s chagrin, his big-shot Hollywood actor brother, Cooper (guest star Matt Bomer), comes to visit.

Link #2 Link #3 Things heat up as the New Directions go head-to-head with the Dalton Academy Warblers at Regionals.

link #2 link #3 In honor of Valentine’s Day, Will challenges the New Directions to find and perform the world’s greatest love songs. Meanwhile, Rachel’s two dads Hiram (Jeff Goldblum) and LeRoy Berry (Brian Stokes Mitchell) pay a visit to McKinley High.