It's moonshine season in Appalachia. Josh has hit the ground running but working solo can lead to catastrophic results. And former outlaw Tim Smith is training his son JT to help run his legal outfit.

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

Josh finds himself in desperate need of help following a catastrophe and Chico and Sandra's moonshine partnership puts strain on their relationship. Mark and Digger get innovative with their still, but the operation attracts an unwanted visitor.

A rookie mistake could ruin Josh and Chuck's operation and Tim travels across the Atlantic to teach an old Irish distillery about making moonshine. Mark and Digger's mash test is interrupted by an unwanted visitor.

Mark and Digger struggle with a special recipe for a shine legend. Big Chuck tries to redeem himself after destroying Josh's operation. Chico and Sandra continue working on their still site, but disaster strikes.

It's Christmas time in shine country! Mark & Digger get in the holiday spirit by playing Santa Claus for kids in need. Patti & David prepare special treats for a festive holiday feast. Bill and friends prepare for Christmas caroling the Carolina way.

Tim needs to rescue his operation, challenging the laws of nature and time. Mark and Digger implement a high tech addition to their operation that could double their output, if it doesn't blow them up. Jeff and Lance make a once banned liquor.

Josh and Big Chuck find a new still site in hopes of reviving their season; and Mark and Digger test their still design. Later, Mark and Mike check out new territory.

Tim Smith aims to put a whiskey time machine to the test; Chico and Sandra switch gears with a new recipe in hopes of jump-starting their stalled season; Mark and Digger opt to experiment with distilling an old classic on their high-speed rig.

Josh and Chuck work to reclaim their place at the top. Later, money threatens an old partnership for Jeff, Mark and Lance; and Mark and Digger craft a special brew for a high-rolling customer.

With liquor stockpiled, Carolina shiners Josh and Big Chuck start digging for a new stash site. The pressure's on as backwoods distillers Mark and Digger haul 60 gallons of premium gin to Nashville the sale of their career. In the Louisiana swamplands, father/daughter duo Patti and David follow nature's harvest to make a sweet new brew.

Mark and Digger bring in a moonshine legend to rev-up production; Josh and Chuck turn to an old power source to prolong their operation; Chico and Sondra gear up for their first big sale of the season; Tim puts money on the line.

Jeff and Lance attempt to salvage their absinthe recipe; Mark puts his new partner to the test; backbreaking labor and a lack of profit threaten to leave Josh up the creek without a paddle or a partner; Patti and David lack their key ingredient.

An ingredient has Josh and Chuck ready to quit the biz; Mark and Digger band together with JB to run their signature spirit; Tim puts his turbo-aged whiskey to the test; and Chico and Sondra have their sights on a new brew.

Josh and Chuck struggle to finish winterizing their site; Mark and Digger bring their two-pot still out of retirement; Mark and Mike have enjoyed a string of successful runs, but delivering the goods could land them in the crosshairs of the law.

Winter closes in and shiners aim to finish their seasons strong; Mark and Digger clash with the law; a breach from an intruder leaves Josh and Chuck deep in debt; Chico and Sondra's operation is burned.

Jeff, Mark and Lance head their separate ways; Tim gets to spend time with an old friend; Patti and David end their season with a boatload of shine.

Jeff, Mark and Lance's legendary partnership comes to a bittersweet end.