After Mr. Heckles dies and leaves all his belongings to Monica and Rachel, Chandler discovers eerie similarities between the late eccentric man and his own life. Ross and Phoebe have a dispute over the progression of evolution.

It's Christmas time and Monica tries tipping with cookies, rather than cash, with mixed results. Phoebe tries to track down her real father. And Chandler and Joey wait too late to shop for presents.

Joey attempts ballroom dancing in order to help Monica and Rachel keep their illegal sublet. Phoebe is attracted to one of her massage clients. And Ross tries to help Chandler quit the gym.

Chandler and Joey discover that they're getting a free porno station on their TV. Monica encourages Ross to tell Emily he loves her just before she leaves for London. Phoebe gets some shocking news when she visits her OB-GYN.

Chandler and Monica prepare to leave for their honeymoon as Rachel prepares to tell Ross that he's the father of her baby. While traveling, Monica and Chandler become jealous of another honeymooning couple who get bumped to first class on the airplane. Meanwhile, Joey and Phoebe scheme to get inside the newlyweds' apartment after discovering that they don't have a key.