The One With the Fake Monica

When her credit card is stolen, Monica takes Phoebe and Rachel to catch the thief. However, Monica strikes up a friendship with "the Fake Monica" and changes her personality from a "mother-hen" into a "party-girl". Meanwhile, Ross is forced to say goodbye to Marcel when he discovers the monkey has reached sexual maturity. But struggles to find a zoo to put him into, whilst Joey enlists Chandler's help to come up with a less ethnic stage name.