Fred Cross

Dede is getting remarried and Manny convinces the family to take the train up to the wedding. Jay could not be more ecstatic that Dede has moved on for good but his overenthusiasm might come back and bite him later. Claire and Mitchell work on their toast while Phil and Cam geek out over their favorite author who is also on the train. Luke and Manny go a little girl crazy, Gloria gets stuck in coach and Alex gets caught up in the romance of the train herself.

After an amazing date with Justin (guest star Justin Theroux) in Indianapolis, Leslie (Amy Poehler) tries to impress him with a dinner party at her house. Rashida Jones, Paul Schneider, Aziz Ansari, Nick Offerman, Chris Pratt and Aubrey Plaza also star.

When Pam asks the office to help her track down the vandal who defaced her mural, Dwight and Nellie spring to action. Darryl has difficulty dealing with the cleanliness habits of Jim in their shared Philly apartment. Meanwhile, Angela grudgingly allows Oscar and Kevin to attend her son's first birthday party.

Larry learns to embrace the upside of disability without actually being disabled, and looks to disprove the rumor that Rosie O'Donnell can kick his butt.

"Stairmaggedon" strikes the office when the elevator goes out and everyone is forced to take the stairs. Dwight (Rainn Wilson) forces Stanley (Leslie David Baker) to do an important sales call. Pam (Jenna Fischer) and Jim (John Krasinski) find comfort in talking with Nellie (Catherine Tate) and Toby (Paul Lieberstein) about marital troubles. Meanwhile, Angela (Angela Kinsey) stands by her man.