Season 1 - 3. The One With The Thumb

Chandler's reunited with his beloved cigarettes, which the rest of his friends can't stand. Monica dates a man all her buddies love but with whom she's bored. And poor, honest Phoebe can't deal with the fact that her bank gave her one thousand dollars that isn't hers, plus a soda company gives her seven thousand more unwanted bucks after she finds a dismembered thumb in a can of soda.