Patti and David scramble to locate a clean water source for their operation; Mark Rogers ventures into unfamiliar territory to secure new buyers; Mark and Digger use an old moonshiner's trick to spook intruders from their still site.

Rookie mistake could leave Josh and Chuck's operation dead in the water; Tim Smith travels across the Atlantic to teach an old Irish distillery a thing or two about making moonshine; Mark and Digger's mash test is interrupted by an unwanted visitor.