The brothers build a mobile speakeasy that runs on home-brewed alcohol; Dave and Jamie make some tough decisions concerning their falling motorcycle shop.
Region one wardens come across a squatter on public land that leaves them speechless; region five wardens are on high alert at the annual Yellowstone River Boat Float.
R.L. opens up to Casey about the trials that led him to realize the importance of "Be Alive"; Chris and Kaid are holed up in the tent at the mercy of the Alaskan weather; Casey and R.L. find some food.
Froy and Sonia are overwhelmed by a swarm of cheerleaders; Matt and Froy interrupt a father and son bonding session gone wrong; the team heads to the raceway to prove they still have what it takes.
Mike Rowe heads to San Diego to join the Derby Dolls, a roller derby team where athletes range from 18 to 50; under the guidance of manager Isabelle Ringer, Mike learns footwork, balance and how to fall safely on the inclined track; given the name Skid Rowe and a lucky number 13 jersey, he discovers that while roller derby is a hard-hitting contact sport, it's also a community where women push each other to succeed.
Jay explores cars that are rolling works of art; Jay and TV show host Trevor Noah take a ride in an outrageous Lamborghini Aventador; Jay meets Chris Runge, a designer who crafts works of moving art; Jay talks to custom car designer Rick Dore.