S4·E18 The Unkindest Cut

Elaine spends over $200 to go to a trendy hairstylist before a special date, but the result is outrageously bad. When she expresses some disappointment, the hairstylist insults her and she leaves, crying, but still pays. Alex talks her into going back and standing up for herself, so she can get her hair fixed and her money back. That doesn't go too well, but in the end, Louie, who has followed Alex and Elaine to the hairstylist, exacts revenge on the guy by pouring a bucket of red hair dye on him.