Heckle and Jeckle

Free Enterprise (1x15)

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Heckle & Jeckle sneak into a prison to sell drills, hacksaws and other tools to the inmates. The hound dog guard catches them and puts them in a cell. They trick the guard into shooting out the bars on their cell, and they escape by jumping into a truck full of coal. The truck then dumps the coal right back into the same prison.