Monica is broke and decides to gamble on the stock market, while Chandler and Ross run into a couple of bullies in Central Park. Rachel and Joey help Phoebe locate her father, but a vicious dog prevents Phoebe from finally meeting him.

Phoebe's half-brother visits, but they have trouble bonding. Joey attempts to build an entertainment center. Ross is challenged to name the five celebrities he'd like to sleep with most.

Monica receives a tip from an admirer worth a small fortune then goes out with the guy. A hypnosis tape intended to assist Chandler to stop smoking has a rather strange side effect. Phoebe is upset when her 18-year-old half-brother, Frank Jr., makes a surprise announcement that he is getting married - to a woman more than twice his age.

Phoebe considers her options when her brother visits with his new wife and asks her to carry their child. Joey works as a tour guide at Ross's museum and tries to tear down the walls between tour guides and scientists. And Chandler seeks advice from Monica and Rachel after he fears that he will not live up to Kathy's sexual expectations--especially since the last guy she slept with before him was Joey.

Phoebe's uterus is examined for implantation of the embryos. Meanwhile, a seemingly harmless game between Chandler and Joey against Monica and Rachel escalates into a full blown contest where the stakes are raised higher and higher.

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.

Phoebe is rushed to the hospital for the birth of her brother's triplets. While there, Joey winds up with severe sympathy pains that turn out to be kidney stones. Meanwhile, Rachel tries to set Monica up on a date with a male nurse.

Rachel, Joey and Charlie attend an uncomfortable dinner party at Ross' apartment. Chandler commits an unpardonable act when he and Monica visit a couple who have adopted a cute boy. Former surrogate mother Phoebe is visited by her brother, Frank Jr., who is desperate because he can no longer cope with his precocious triplets.