The two-part episode revolves around the wedding of Jim and Pam at Niagara Falls. Not all goes smoothly when Jim accidentally reveals Pam's pregnancy to all the guests, including Pam's very old-fashioned grandmother, and Andy injures his scrotum while dancing. Meanwhile, Michael and Dwight both try to hook up with women, with mixed results.
- Hoist by His Own Petard: In the cold open, the office workers, especially Dwight, refuse to make concessions in their behavior due to Pam's morning sickness. When Dwight mocks her with a hard-boiled egg, Pam vomits at her desk rather than going to the bathroom, setting off a chain reaction of vomiting through the whole office.
- Open Mouth, Insert Foot: Jim repeatedly warns everyone not to let Pam's grandmother know that she is pregnant, then slips up during his toast and blurts it out.
- Michael then tries to help bail them out.
- Shout-Out: Dwight is seen wearing the Three Wolf Moon shirt.