It's Christmas in Appalachia, and Tim Smith is 4000 miles away in Alaska making a special delivery to his northernmost customer; in Tennessee, Mark and Digger cook up a plan to make a holiday run of liquor for two legendary shiners from a bygone era.

The shiners must step it up to stay ahead of big liquor and the law; a 100-mile-per-hour wipe-out puts Josh's operation in jeopardy; Tim takes a risk on rye; Mark and Digger are hell-bent on backwoods justice after Mike's betrayal.

Tensions boil over in Tennessee as Mike must answer for blowing up Mark and Digger's still; with Tickle in jail, JT answers the call when two outlaw shiners show up looking for help; Josh discovers his mash barrels are under attack by a black bear.

Tim finds himself on the wrong side of the law after son JT spots an agent near a backwoods still site; Mike designs a unique still to make high-dollar shine; Mark and Digger make an in-town run; Josh discovers what bears do in the woods.

Ten years after Popcorn Sutton's death, his widow reveals a clue that could lead Mark and Digger to a hidden stash; Mike must gin up his brandy game to pay off his debt to Mark and Digger; Donnie and Teresa build a still site in a Kentucky cave.

Booted off his backwoods still site, Josh turns to his stockcar racing roots to invent a new way of making moonshine; old-timer JB comes to the rescue as Mark and Digger fall short on high-proof run; Mark Rogers has a close encounter with the law.

When their still site gets compromised, shiners Henry and Kenny enlist the help of bootlegging legend, Amos Law; to pay off his debt to Mark and Digger, Mike runs his still to the breaking point; Tim doubles down on JT and Tickle's double rye.

Top moonshiners gather to deal with unfinished business; Mike tells his side of the Mark and Digger feud; Josh reveals scars from his checkered past; the shiners put their skills to the test in a whiskey showdown.

Mark and Digger's new apprentice proves that talent can't be taught; Josh converts a new racecar trailer into a mobile moonshining masterpiece; Mark Rogers enlists the help of a retired lawman to bootleg 30 gallons of shine into a music festival.

As Josh gets ready to fire up his mobile still at a biker rally, law enforcement gets wise to his illicit plan; Mark and Digger's backwoods potato vodka hits a sweet spot; short on payback cash, Mike and Daniel invent a new way to get out of debt.