The Dukes of Hazzard S07 E05 No More Mr. Nice Guy

"You're in Hazzard County where the lawmen are crooks, the good guys are outlaws and ever'body's in-laws!"

Boss swindles the Dukes into thinking they won a bunch of prizes at the Capitol City Department Store. All the prizes turn out to be stolen. However, Boss Hogg gets a bump on the head, later on, gets amnesia and becomes a nice gentleman - temporarily.