Claire tries to negotiate peace while Phil sneaks off to the spa; Jay's plans horrify Gloria; Cameron unearths some disturbing artifacts while researching.
Phil and Claire decide to swap parenting roles for the day; Jay gives business advice; Cameron's illness leaves Mitchell torn over a pair of in-demand tickets.
Jay wants a quiet birthday, but the family has other plans; Claire and Mitchell get trapped; Phil runs into his old nemesis; Cameron gets into some hot water.
In search of some outdoor fun, the family heads to Wyoming where they try their hands at cattle herding and skeet shooting; Jay gets in a fight with a cowboy.
Mitch and Cam share their intentions to adopt another child with the family, but Lily's desires become cause for concern; Claire and Jay try to prove a point.
Gloria can't stand Jay's growing relationship with Stella; Cameron goes on a fast with some rather terrible timing; Claire tries to teach life lessons.
Phil takes Haley to his old college, and Claire forces Mitchell and Cameron to take her for a fun night out; Gloria and Jay may have "the talk" with Manny.
The Cooper family cares for the school's librarian after George Sr. mistakenly forces her to go to hospital; Meemaw teaches Georgie about relationships.
Sheldon goes to see the dentist and experiences a scientific epiphany; Dale and Meemaw get ready to visit a casino, but problems arise at the store when Dale.
Sheldon comes to learn that Mary has been guarding a certain secret regarding his future; Meemaw discovers that Dale had fired Georgie and becomes irate.
Sheldon gets ready to spend the summer working for a local train museum; George and Missy spend more time together as she starts a new phase of womanhood.
Monica invites an old friend from high school over for Thanksgiving dinner, unaware that he started a "We Hate Rachel" club with Ross; Joey vows to eat turkey.
Monica's expensive new boots hurt her feet, but she's determined to prove to Chandler that her purchase was worth it; Ben goes to school with Sting's son.
Mona wants to send joint Christmas cards with Ross; Chandler's boss wants to go out with him and Monica; Rachel's hormones drive her to come on to Joey.
Joey wants to take Rachel to dinner on a pretend date to practice his dating skills, but soon develops romantic feelings for her; gang addicted to Mrs. Pacman.
Monica turns Chandler on to the concept of taking a bath to relax; Ross and Rachel toss baby names around while deciding whether to learn the baby's sex.
Chandler realizes he's never seen what's in the closet by the bathroom and tries to break in; Joey suggests that Rachel should move in with Ross, for the baby.
Monica and Chandler's romantic Valentine's Day is interrupted when they watch a videotape of Phoebe's friend giving birth; Mona dumps Ross; Joey loves Rachel.
Sheldon is interviewed for a film concerning Spock from "Star Trek"; Wolowitz disagrees with Bernadette over making renovations to the home he grew up in.
Sheldon and Amy spend Thanksgiving together as friends; Wolowitz volunteers at a soup kitchen; Penny realizes Leonard knows her more than what she thought.
Sheldon has an epiphany when a song gets stuck in his head; Dave is invited over to Amy's for dinner; Wolowitz and Koothrappali obsess over a fan of their band.
Sheldon discovers the importance of being empathetic and apologizing after Penny, Leonard and the gang leave for a weekend getaway in Las Vegas without him.
The gang arranges for a special guest to surprise Sheldon on his birthday, along with a few other people from their past who want to make the day memorable.
The gang arranges for a special guest to surprise Sheldon on his birthday, along with a few other people from their past who want to make the day memorable.
Wolowitz reconsiders his decision to apply with Leonard and Sheldon for a patent for their infinite persistence gyroscope; Koothrappali receives dating advice.
A secret government agency recruits a ragtag band of criminals to act as disposable assets on risky covert operations in exchange for reduced sentences.
Gloria makes Jay step it up for a night of salsa dancing or else; Cameron takes a bet too far; Phil builds a tree house for Luke, but ends up making new friend.
Phil starts to think of what could have been; Jay feels Manny could use some constructive criticism; Cameron is offended when Mitchell questions his childhood.