Season 1: Episode 06: The One With The Butt
Chandler starts dating a beautiful woman, who is not only married but also has another boyfriend. Chandler is thrilled at the prospect of having "all the fun but none of the responsibility," but eventually learns that it's not all it's cracked up to be. And, speaking of cracks, Joey gets cast as Al Pacino's "butt-double" and gets fired for overacting.