Phil and Claire take Cam and Mitch out to dinner where they drink a bit too much, which leads to sharing a bit too much, and results in being hung over.
Cameron's birthday falls on Leap Day, and the pressure for Mitchell to get it right is high; Phil's plans to celebrate the holiday are thwarted by the girls.
After Cameron's clown mentor passes away, he is reunited with his ex-clown partner; Phil is trumped by another agent when trying to land an important listing.
Claire helps Luke cope with the passing of his friend and neighbor Walt; Phil and Alex have some quality father-daughter time; Haley hosts an unapproved party.
The Dunphys are shopping for a new car; Phil makes an impulsive purchase without Claire; Jay is firm in going to his high school reunion with Gloria and Manny.
Sheldon is pursued by dozens of grad schools after his paper is published; Georgie struggles after deciding to speak more properly in front of his daughter.
When George Sr. begins to suspect Mary wants another baby, he goes behind her back to get a vasectomy; Drs. Linkletter and Sturgis ask Sheldon to tutor them.
Nine-year-old Sheldon Cooper excels in the academic fields of mathematics and science but struggles to deal with the church-and-football culture of East Texas.
Sheldon worries about not being able to appease his worried mother and decides to use techniques from a self-help book regarding making friends with others.
Ross seeks solace at a party after a bitter fight with Rachel and ends up in the arms of another woman; Phoebe's date needs an interpreter to communicate
Ross and Rachel compete for quality time with their shared friends following their bitter breakup; Chandler takes up a nasty habit of smoking once again.
Rachel goes on her first date after splitting from Ross, and it's with Mark; Monica continues to date Pete, even though she is still not attracted to him.
Monica's aunt dies and leaves her an antique dollhouse that she doesn't want Phoebe to play with; Rachel regrets setting up Chandler with her boss, Joanna.
At the premiere of Joey's big play, Ross alone concludes that Rachel's date is insane; Joey falls in love with Kate, but she gets a big job in Los Angeles.
Ross seeks advice from Phoebe's herbalist when he's afflicted with a mysterious skin condition on his butt; Monica worries that Pete may propose to her.
Monica must decide her future with Pete when he plans to enter the Ultimate Fighting Championship; Chandler has a problem when his new boss is slaphappy.
While at the beach, Phoebe meets a family friend with links to her past; Ross discovers that Rachel still loves him and must decide between her and Bonnie.
Things are going well for Leonard when Penny makes a surprise revelation on her second date with Stuart; Howard seeks help fixing an error in his NASA project.
Howard and Raj go to a Goth nightclub to in order to meet women; Sheldon attempts to alter Penny by using a chocolate-based behavior modification program.
Raj faces deportation back to India when his job situation turns sour, but Sheldon has a unique solution to the problem; Leonard and Penny deal with Howard.
Ten teams enter the qualifier, while six teams will move on to the grueling gauntlet, and the two teams to finish first will then enter the Wipeout course.
Jay and Gloria fight over lunch; Phil must fire Mitchell; Cam and Claire debate over disciplining children; Alex tries to complete a "living art" display.
Phil takes Jay on a fishing trip; Gloria struggles with sharing her news; Dylan moves into the Dunphy's temporarily; Mitch and Cam decide to adopt a cat.
When Phil and Claire drop Haley off at college, they wind up embarrassing her; Manny forces Jay and Gloria to take a baby class; Lily gets in a tussle.
Claire must tone down Halloween; Phil has an open house; Lily wonders about her real mom while Mitch and Cam host a costume party; Gloria's pregnancy hormones.