Season 5: Episode 72: The Barber
George is uncertain about whether his job interview was successful or not, so he decides to go into the office and act like an employee while the boss is on vacation. Jerry is reluctant to dump his old barber even when he is given a real bad haircut. Kramer arranges to get him a clandestine haircut at the apartment of his barber. Newman is charged by Jerry's barber to get a sample of Jerry's hair when he suspects foul play.