OCC is enlisted to build a bike for the Iraq Star Foundation, which provides free reconstructive surgery to U.S. soldiers injured in Iraq and Afghanistan.

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, Sr. travels to the Middle East in an attempt to expand OCC's international reach.

A client commissions OCC to build a chopper trike; Paul Sr. learns that Mikey is in rehab and wonders if there's any hope of salvaging their strained relationship.

OCC is commissioned to build a chopper for the Ornge medical transport company; the team struggles trying to figure out how to build a sidecar capable of carrying the same kind of stretcher found in an ambulance; Paul Jr. Designs project.

The guys at OCC are tapped by Kobalt to build them a custom chopper. With a brand new set of tools, Senior and his team get busy designing and building an incredibly unique chopper. Junior gathers the family together and makes a truly life changing announcement.

In an effort to continue their business expansion, OCC is 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 face an uncertain future as the Teutul dynasty crumbles; OCC builds an electric chopper for Siemens; Paul Jr. continues to work on building his new company.

Chicago White Sox pitcher Mark Buehrle's wife commissions OCC to build him a surprise chopper to commemorate his perfect game; Paul Jr. continues to work on a project for Coleman, his biggest client.

Times are tough at the OCC shop. Now that Jr. has been fired he's on the hunt for a new project to take up his time. Sr. and the rest of the team clown around at the circus, and build a bike to honor the music festival held at Woodstock.

Schneider Electric is challenging Orange County Choppers to build a custom motorcycle that will support our company mission of helping people make the most of their energy.

The OCC guys create their first diesel-powered chopper for Monster Diesel; Paul Jr. attends the grand opening of a dog park that he designed for his hometown of Newburgh, N.Y.

OCC builds a bike for pool champion Jeanette Lee inspired by her ``Black Widow'' nickname; Mikey is back from rehab and ready to make amends; Paul Jr. explores designing a campaign for an Indy racing team.

Sr. is having some work done on the shop and in return he's building bikes for the contracted companies, DECA and Columet.

The guys of OCC have their work cut out for them with two new projects: a B-2 Bomber bike for Northrop Grumman and one for the NHL. The company's foundation is rocked as Paul Sr. and Paul Jr. go head to head in a no hold's barred argument.

Paul Sr. attempts to make amends with Paulie Jr. now that he is no longer working at OCC. He invites Jr. and Mikey his home to work on the Triumph Bike project, just for fun.

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 Mt. Creek bike running smoothly, he calls Jr. in as a consultant to help out.

OCC goes green by attempting to build the first clean-burning natural gas powered bike for the Chesapeake Energy Corporation. Their vision and ingenuity will be put to the test...can a bike be built which is energy efficient and still perform as a chopper? Meanwhile, at Paul Jr. Designs, Paul Jr. gets his first client in Coleman which wants him to put a new spin on a current product. Elsewhere at OCC, Mikey begins questioning his relationship with his father and role at the shop.

With Junior and Mickey squeezed from the family business, life goes on with some changes. Meanwhile, the crew build a bike for the Saginaw Chippewa Indian tribe.

A truce is made between Paul Sr. and his sons as they make an appearance on "Larry King Live.'' Later, Paul Jr. makes his first solo appearance since leaving OCC by heading to the Midwest.

The team designs a NASCAR-inspired chopper for the Stewart-Haas racing team. Mikey participates in JDRF's Ride to Cure Diabetes. Paul Jr. pitches a new line of dog toys.

To mark the occasion of OCC's 10th anniversary Sr. designs a bike for the masses. He's written a new book and gets invited to ring the bell at the NYSE, and to appear on some famous late night talk shows in order to promote it.

The crew from OCC take a trip to Howe Caverns to explore the deep underground caves and to face their fears. Paul Jr. works on his own projects outside the shop, while still acting as a consultant at OCC.

The guys work on a chopper for their newest client, Gladiator Garageworks; Mikey tries to face his fears by performing his comedy routine in front of a live audience; Paul Jr. drops in on "The Adam Carolla Podcast''.

The guys are commissioned to build a ``wheelchair chopper'' for the Christopher and Dana Reeve Foundation; Paul Jr. makes his first visit to OCC in more than four months, but the family divide continues.

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.