Friends: Season 4, Episode 7

4 - 7: The One Where Chandler Crosses the Line

A smitten Chandler is horrified when Joey begins cheating on Kathy. But soon turns the situation to his advantage by persuading Joey to choose. However, it backfire when Joey realise he loves Kathy. Things get a lot worse for the best friends when Chandler is left alone with Kathy for the night. Meanwhile, Ross relives his college days by re-discovering his talent of playing keyboards. But the gang discover he is not as talented as he makes out.