Phil's staircase thwarts Claire as she heads to an interview for her dream job; Cam and Mitch discuss the positives and negatives of adopting another child.
When Mitchell struggles to move on from his old life, Gloria steps in to help him say goodbye; Haley, Luke and Alex decide to host a party at the Dunphy house.
Phil tries to help Luke prove he is responsible enough for a bicycle, but a hot neighbor causes trouble; Mitchell and Cameron take Lily to Mommy and Me class.
Jay and Gloria invite everyone over for barbecue and football, but an earlier incident at school and the utterance of an unflattering label make things awkward.
The whole family supports Manny in his fencing ambitions, but Jay's enthusiasm triggers an old wound for Mitchell; Phil tries to find Luke's hidden talents.
Claire decides to surprise Phil with a really great present, only to be surprised herself; Cameron and Mitchell go out for a night on the town with a friend.
Sheldon tries to act more like a kid out of fear of becoming a future social outcast; Meemaw's relationship with Dr. Sturgis is tested when he learns to drive.
Sheldon is a less-than-stellar patient when he is forced to spend multiple days in the hospital; Missy learns what life could be like without her twin.
Sheldon and Dr. Sturgis get into their first fight when one of Sheldon's test answers is marked wrong; Mary assumes the responsibilities of Pastor Jeff.
Monica and Rachel are tired of their new apartment, so they try to bribe the boys into taking it back; Ross asks Emily to marry him, much to Rachel's chagrin.
The friends head to London for Ross's wedding; Chandler is annoyed when Joey buys a ridiculous hat while touring London; Rachel decides to attend the wedding.
Chandler accidentally kisses Monica in front of Phoebe and Rachel and then must kiss them to cover it up; Rachel finally tells Ross her feelings for him.
Joey thinks he's hosting a telethon for PBS, but turns out to be a pledge-taker; Phoebe, trying to perform a selfless deed, unknowingly donates money to PBS.
Monica and Rachel think that Bigfoot has moved into their building; Emily and Ross end their marriage after Ross refuses to end his friendship with Rachel.
When a new and exciting job opportunity overseas is offered to Leonard, it causes Sheldon to become jealous of his success and throws Penny for a big loop.
Sheldon seeks revenge after Amy ruins one of his favorite movies; Leonard discovers a way to get Penny to do anything; Stuart creates an online dating profile.
Sheldon's favorite childhood hero contacts Leonard with an offer to help with an experiment, leading Sheldon to befriend rival TV science host Bill Nye.
Sheldon tries to protest while he is dragged to Mrs. Wolowitz's home for Thanksgiving; Penny and Leonard decide to deal with a mistake from Penny's past.
Sheldon struggles with the fact that his discovery was an accident, and when Leonard disproves it, he is even more upset; Raj stays with Howard and Bernadette.