Back to the Future (1991)

S02E12 St. Louis Blues

Title: St. Louis Blues Plot: At the Brown residence, Doc’s latest hair trimming gadget causes chaos with Marty's hairstyle. Frantic to remedy the disaster, Marty and his friends set off to locate Doc, who is enjoying the 1904 World's Fair with Clara. However, things take a turn when P.T. Tannen snatches Marty and puts him in a sideshow act, complicating their quest to restore his hair to its former glory.