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.
Phil builds a habitat for the duck eggs and convinces Lily to help him hatch them; Claire is anxious about telling Jay and his team about her ideas for closets.
Claire wants to make sure that Haley and Alex have fun on "Bring Your Daughter to Work Day"; Phil helps Luke and Manny's class with community service day.
While eating Thanksgiving leftovers at Jay and Gloria's house, everyone decides on their own to sneak into the house that Phil is selling; surprise family trip.
Gloria wins a family seminar with the author of "Clean Out Your Junk Drawer," Debra Radcliffe, who encourages people to get rid of their emotional junk.
Claire and the children are of tired the ducks being in the house, so they try to get rid of them while Phil is visiting Alex at college; Lily has a sleepover.
The Ghost of Christmas Past tries to revive Stan's holiday spririts, but he seizes the opportunity as a chance to change the outcome of the Vietnam War.
Carl is happy to hear that Steve is in the hospital for a surgery, but he changes his tune when an injury forces the two of them to share a hospital room.
Steve camps out on the Winslow's roof and refuses to leave his post until Laura agrees to go on a date with him; Richie tries to dodge the affections of a girl.
Georgie is elated to learn that Veronica will be staying the next few days at the Coopers' house; Dr. Sturgis and Meemaw celebrate their first anniversary.
The Cooper family helps Pastor Jeff cope with a difficult situation regarding his marriage; Sheldon joins Mary at work and tries to push for donations.
Sheldon decides to invite the people from his school to attend a Nobel Prize announcements party; Meemaw discovers more details about Dr. Sturgis' past.
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.
Everyone prepares for the Gellers' wedding anniversary in Long Island; Monica struggles to prepare the perfect toast; Phoebe invites her new boyfriend, Parker.
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.
Wolowitz reconsiders his decision to apply with Leonard and Sheldon for a patent for their infinite persistence gyroscope; Koothrappali receives dating advice.
Sheldon surprises Amy by sharing a secret with her about his old laptop computer; Koothrappali reveals to Penny and Bernadette that Leonard and Wolowitz lied.
Sheldon, Amy, Leonard and Penny spend their weekend at a cabin; Koothrappali purchases an overwhelming amount of gifts for Wolowitz and Bernadette's child.
Leonard's newly-divorced parents and Sheldon's religious mother arrive in town; Wolowitz and Koothrappali are convinced that the government is out to get them.
Claire recruits the family's help to declutter their home; Cameron frets over Jay's dangerous new pastime activity; Mitchell teaches Gloria how to play golf.
Claire and Phil take on a new dynamic, as Claire runs the closet business and Phil remains behind the scenes, causing Phil to get fed up with being ignored.
Phil's new client happens to be "his type" so he lies to Claire about her; Gloria believes that her yoga teacher is attracted to her and asks Claire to come.
When Claire brings home a stray dog and asks the kids to help her hide it, Phil takes her evasive behavior as a cry for attention; Gloria invites a couple over.
Claire is on high alert when she becomes convinced that there is a mole in her company before Closet-Con; Phil and Gloria confront Auntie Alice for stealing.
Manny convinces the family to join the wedding when Dede gets remarried; Jay is ecstatic that Dede is moving on for good; Claire and Mitchell work on toast.