S4E3 · The One With the 'Cuffs

Complete story — includes the ending

Joey is enticed when a door-to-door encyclopedia salesman shows up at his apartment, since he has always felt left out whenever the gang has intellectual conversations. However, Joey can only afford to buy the sample volume and becomes knowledgeable only on subjects that start with the letter "V." Monica caters a party for her mother, but the mini-quiches are effectively ruined when one of her false fingernails gets lost in one. Judy then reveals that she expected Monica to mess up so she bought frozen lasagnas as back-up. Monica, upset that her mother has never had faith in her, whips up delicious dishes at the last minute to prove her mother wrong. Judy ultimately gets impressed and the two reconcile. Meanwhile, Chandler begins dating Rachel's boss, Joanna, again but lands in a sticky situation when Joanna handcuffs him inside her office, then leaves for a meeting that gets delayed, stranding him for hours. Rachel is furious when she sneaks into Joanna’s office (having been under the impression that Joanna has been listing names of employees that would get a Christmas bonus) to find Chandler stuck there pantsless, since he has promised to end the relationship many times but never does.