OCC rings in the holiday season with their annual Christmas bike, fabricating a custom sleigh worthy of old Saint Nick that will be pulled by the previous year's Christmas Bike. And so, with Junior and Vinnie tied up in the shop with customer bikes, Senior, Mikey, Rick and Campo head down to the iron shop to build their creation in time to use the bike and sleigh to deliver gifts to needy families.

It's off to visit car-racing legend Carroll Shelby, during which OCC discusses design ideas for their tribute to Shelby's long career. But after deciding on their ultimate inspiration — a classic Shelby Mustang — the boys return to their usual antics: Senior takes a Shelby car for a high-speed spin and fights with Junior over the bike's frame, a golf cart is taken for a destructive joyride, and Gus gets locked in Senior's Hummer. Will they get things together and finish the bike before their fast-approaching deadline?

The Lincoln motor company. A name that means elegance and superior handling. So how does a subsidiary car company of Ford celebrate the release of their first pick-up truck? Get OCC to build a custom chopper, of course! In a day full of test rides and crashing trucks, Paulie, Vin, and Rick nail out some of the details on this bike and test out their new FloJet machine.

As work continues on the Lincoln Bike, Mikey pitches in to complete some extra features and to keep the guys on schedule. Then, after the bike goes out for its paint job, Junior and crew travel to Washington, D.C., to visit injured troops at Walter Reed Memorial Hospital. Back in New York, the rivalry between Orange County Choppers and Orange County Iron Works is played out in a hardcore game of dodge ball. But too much play and little work means a final scramble to finish the build when the crew encounters huge problems during the bike's final assembly.

OCC's next project has them building a chopper based on a Caterpillar bulldozer, but things don't go as well at the shop when Paul Jr. and Mike Campo can't agree on the bike's design.

The fights continue as the guys struggle to complete assembly on the bike for Caterpillar, their efforts slowed by major problems with the rear fender.

In search of ideas for their newest theme bike, OCC visits Gillette's headquarters in Boston. Then, back in the shop, the guys split their attention between production bikes and the Gillette Bike, while Senior takes some fabrication frustration out on Junior and Vinnie.

The guys complete the bike for Gillette, unveiling it at Boston's Prudential Center. Meanwhile, as an added bonus, Mikey babysits Vinnie's daughter, so Vinnie and his wife can have a much-needed night out.

It's off to drag-racing school in New Jersey for the OCC guys, as they prepare to build a drag bike for NAPA. And this bike will be unlike any other: It'll have a straight speed of 140 mph, and will be used in actual races on the quarter-mile drag track. Also out of the ordinary is Mike, who stops his loafing around and gets a new title at OCC after Mike Campo quits.

OCC finishes the NAPA bike, and Vinnie races it down the strip in an actual drag race.

The Teutuls are given the opportunity to participate in a charity auction to benefit the familes of wounded or dead soldiers. Paul Jr. and Sr. compete to design two different bikes to be auctioned off and a tense competition is underway. Meanwhile, Paul Sr. gives his mom back her 1984 Cadillac Deville, completely restored.

The competition heats up as Senior and Junior compete to assemble and complete their bikes when they come back from paint, powdercoat, and chrome. When Senior pulls ahead, Junior gets the last laugh when he manages to get his bike started with the absence of a gas tank and a rear wheel.

OCC is given the oppurtunity to build a Yankee-inspired bike for the Jorge Posada Foundation. Paul Jr. takes to the field in designing a one-of-a-kind baseball themed bike that includes bat-shaped handlebars and a primary cover with an etching of Yankee Stadium. Struck with inspiration, Paul Sr. arranges for a softball game between OCC and Orange County Ironworks.

The final days of assembling the Yankees Bike come down to the wire when parts come back from paint and powder coat, but Paul Jr. is pushed to his limits when parts go missing. Ulitmately, it falls on Mikey to take the gas tank from New York to Milwaukee to have the Yanks sign it without scratching it.

The Teutels go into the wild blue yonder when they get the chance to build a bike to commemorate the launch of the space shuttle Discovery. After their visit to NASA, Paul Jr., Vinnie, and Rick bang away on the bike's fabrication. Tensions run rampant when Paul Sr. finds his son spending more time in Jason Pohl's office than actually fabricating. Will the build be scrubbed, or will it be salvaged?

The guys of OCC take off to Cape Canaveral, Fla., to watch the launch of the space shuttle Discovery, seeking more ideas for the NASA-themed bike. Once back in the shop, Junior continues to work on the bike while Senior and Mikey build a model space shuttle together. After the bike is assembled, OCC heads back to the Johnson Space Center in Houston, Texas, to reveal the bike to NASA and the astronauts who returned home on Discovery.

The final days of fabrication come down to the wire as Rick's old school chopper get sent out to paint, powder coat, and chrome. The mood around the shop takes a 180 when Cody leaves to attend the AMI motorcycle school in Florida to become a licensed mechanic.

The guys decide that it's time for a vacation and what better place than jolly old England? After an all-night flight, Senior, Junior, and Mikey are treated to a double-decker bus tour of London, which puts Senior to sleep. Next they visit the Tower of London, and the numerous torture devices found within may spark some ideas for motivation around the shop.

Adventures and cultural differences await the Teutuls as they travel across the Atlantic for the first time ever. While in London, the guys take in the sights and realize that things are quite different on the other side of the pond. They manage to find some bikes and head out on the open road in Ireland and England, taking in the countryside. On the go and feeling out of place, Senior, Junior and Mikey start to feel new pressures and tensions rise.

Ever wonder what goes on behind the scenes? Find out in this special episode as Mikey films the film crew and travels to L.A. to find out about the post-production work needed to make this one-of-a-kind show come together. Watch interviews with the producer, cameramen, editors, and, begrudingly, the executive producer.

Bryan King is a truck driving, car customizer out of California, and the one thing he wants more than anything is to have his own chopper. Only one small problem: he's in a wheelchair. Overcoming this hurdle is one of many problems that plagues the guys as they design a tike-bike to accomodate Bryan and make this FANtasy Bike one to remember.

After his trip to Europe where he saw some impressive vintage motorcycles, Senior feels inspired and decides to start his own collection of vintage bikes. When the guys try to restore an old classic, they run into some obstacles and need to call on the help of an expert. Senior has everyone working on this project and he decides to build a chopper with a vintage feel as well. Mikey even pitches in, but when he gets pushed too far, he throws a temper tantrum and walks out.

OCC gets a special visit from the "Piano Man," Billy Joel, who asks the guys to build him a vintage Indian bobber motorcycle. To get more insight into their customer's needs, the Teutuls make a special visit to Billy's home and get a tour of his vintage motorcycle collection. But when the paint on the bike comes back the wrong color, the pressure is on to finish the bike in time for its reveal in front of 10,000 fans at a Billy Joel concert.

The guys continue their work on a bike for Wendy's that will be auctioned off to benefit the Dave Thomas Foundation for Adoption.

OCC teams up with Sunoco and NASCAR driver Kyle Petty to build a bike that will benefit the Victory Junction Gang Camp. The guys head down to North Carolina to meet Kyle Petty and to tour the camp. While there, they get the opportunity to hang out and spend time with some of the kids. After that, the Teutuls head to Lowe's Speedway where they take turns going around the track. Once back in the shop, they continue working on this latest chopper.