3x16 - The Dukes of Hazzard

A pair of jewel thieves comes through Hazzard County and while confronted by Boss and Rosco, they make a getaway in the General Lee. This makes Boss think Bo and Luke are a part of the gang. Also, when the loot is found in Rosco's patrol car by his dog Flash, Rosco is fired when Boss thinks he's in on it, too.