The guys at OCC put their skills to the test as they attempt to build the first natural gas powered chopper. While Junior is busy getting his new company off the ground, Mikey questions his relationship with his father and his role at Orange County Choppers.
OCC lands an important international client as they are hired to build a bike for the Abu Dhabi police department. Seeing a good business opportunity, Senior travels to the Middle East in an attempt to expand OCC's international reach.
Jon Gosselin, of the hit TLC series Jon & Kate Plus 8, has commissioned the guys at OCC to build him a bike. To get a better idea of how the father of eight wants his bike to look, the Teutuls take a trip to Jon and Kate's house to see how the family of ten live.
In an effort to continue their business expansion, OCC partners up with industry giant Ducati. The guys in the shop put their unique spin on one of these Italian bikes as they prepare to celebrate at OCC's four day long 10th anniversary bash.
The guys from OCC head to Howe Caverns to face their fears and explore some caves deep under ground. While Paul Jr. continues his work as a consultant for OCC, he sets his sights on his own projects outside the shop.
Paul Sr. is out of the shop as he continues to promote his new book on some popular talk shows. In order to keep the production of the Mountain Creek Bike running smoothly, he calls Paul Jr. in as a consultant to help out.
Junior and Senior's relationship is rocky at best, and now that Junior is no longer an employee of OCC, Paul Sr. tries his best to make amends. He invites Paul Jr. and Mikey up to his house to work on a Triumph Bike, not for a client, but just for fun.
To mark the occasion of OCC's 10th anniversary, Senior designs a bike for the masses. He also appears on some late night talk shows in order to promote his new book. Meanwhile, Junior is working on opening a woman's fashion boutique with his girlfriend, Rachel.
Sr. takes a trip up to Alaska to research a bike and ends up meeting with Governor Sarah Palin. Then it's off to Finland in an attempt to bring OCC to Europe.
Sr. is having some work done on the shop and in return he's building bikes for the contracted companies, DECA and Col-met.