It's the final race of the Mud Cup and four drivers are fighting for the $100,000 prize; a shocking controversy has thrown the championship into question, stunning the entire mud world.

Bryce looks to defend his title against his nemesis, Josh -- but things quickly get out of hand, ending with a broken rig and a bruised ego. Hungry for a sponsor, AJ pushes his ATV to speeds of nearly 100mph.

Racers gear up for the circuit's wildest event: the Rednecks with Paychecks Fall Mud Crawl. Bryce Sparks sends it to win his daughter a new UTV, Randi fights to overcome a traumatic accident with a victory, and two new drivers ignite a rivalry.

The Josh Carmon vs. Bryce Sparks rivalry heats up as they line up for the final event of the fall mud circuit; AJ debuts the largest ATV in the world just in time to face Larry Oakes and Megan Rion in the season's nastiest bounty hole.

Bryce might be at the top, but Texas's big tire course isn't his strong suit; Megan seizes the opportunity to show off her big tire skills; AJ can't find his footing without Madi, and Josh stirs up trouble from the sidelines.

The stakes have never been higher as rivalries intensify and chaos erupts; Bryce and AJ's bitter feud reaches a boiling point; Josh enters a high-risk cash grab event to turn his season around; cheating allegations turn the racers' world upside down.

Competitors strap in for the fall mud circuit in the gritty underground world of mud racing; with big money on the line, no one is holding back.

At Arkansas's Greasy Bend Off-Road Park, rivals Bryce and Josh wager big money on the small tire bounty course; Larry calls up an old friend to help him turn his season around; AJ does whatever it takes to take down his top competition.