Ross finds out his ex-wife is pregnant. Rachel returns her engagement ring to Barry. Monica becomes stressed when her and Ross's parents come to visit.
Monica becomes irritated when everyone likes her new boyfriend more than she does. Chandler resumes his smoking habit. Phoebe is given $7000 when she finds a thumb in a can of soda.
Joey and Chandler take Ross to a hockey game to take his mind off the anniversary of the first time he slept with Carol, while the girls become depressed when they realize they don't have a 'plan'.
Eager to spend time with Rachel, Ross pretends his washroom is rat-infested so he can join her at the laundromat. Meanwhile, Joey has Monica pose as his girlfriend, and Chandler struggles to break up with his girlfriend.
Monica's obsessiveness is put to the test after Rachel cleans the apartment. Joey lands a film role as Al Pacino's butt double. Chandler enjoys a relationship with all of the fun but none of the responsibility.
The gang make (and break) a pact not to bring dates to their New Years Eve party. Phoebe starts dating a scientist. Ross compensates for his loneliness by getting a monkey.