Jim makes a request that leaves Michael feeling defensive and insecure; Pam works on the guest list for the wedding; Toby and Dwight go undercover to investigate a workers' comp claim.
The office mates travel to Niagara Falls to celebrate Jim and Pam's wedding; Michael, Dwight and Andy want to hook up with wedding guests; Jim lets a secret slip at the rehearsal dinner.
The office mates travel to Niagara Falls to celebrate Jim and Pam's wedding; Michael, Dwight and Andy want to hook up with wedding guests; Jim lets a secret slip at the rehearsal dinner.
Having run out of excuses, Jim and Pam are forced to go on an uncomfortable double date with Michael and Helena (Linda Purl); Dwight is doing nice things for everyone in the office.
Troubling rumors about Dunder Mifflin rock Michael's world; strange diversions upset Jim; Andy finds that his awkwardness is his biggest hurdle in courting Erin.
Ross' doctoral dissertation is stored in a remote corner of the university library frequently used by students having sex; Rachel and Phoebe bond with Joey's date (Kristin Davis), then try to convince him to continue seeing her.
Tag joins for Thanksgiving dinner; Joey may have ruined Rachel's chances with Tag when he opens his mouth during dinner; Phoebe reveals that she has been secretly keeping a dog in her room for a few days while its owner is away.
Celebrating Rachel's 30th birthday inspires the friends to reminisce about their own 30th birthdays -- Joey got angry with God for breaking their deal; Ross bought a sports car; Monica got drunk and embarrassed herself at her surprise party.
Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system; Raj and Stuart look after baby Halley while Penny and Amy take Bernadette for a night out.
Sheldon and Amy have their first fight since moving in together; Koothrappali is shocked at the realities of financial independence when he stops receiving support from his father.
Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Wolowitz as well as Amy on the same day; Bernadette nears the end of her maternity leave and must return to work.