American Chopper

The team is building a NASA-themed bike in memory of the two crews lost in space, and heads to the Johnson Space Centre for inspiration.

The guys head to the Johnson Space Centre to reveal the bike to NASA and the astronauts that returned home on the Discovery space shuttle.

Senior decides to surprise Rick and tells him that the next bike that they build will be for him. Mikey comes in to help Rick and acts as his inspiration.

Fabrication continues on the Rick Bike, as the guys pitch in to finish this old school bike for Rick to keep.

One lucky fan's dreams come true as OCC head to Phoenix to surprise him and get inspiration for this chopper.

The second winner is revealed as the guys head to Texas to spend some time with her and learn about what she wants her chopper to look like.

The third winner is revealed. Having sold his bike to pay for his mum's medical treatment, this lucky man will finally have a wheels again.

The final winner is revealed. A car accident left this fan paraplegic, so his dream custom-built trike bike will test the team's talents to the fullest.

Senior's trip to Europe inspires him to start a collection of vintage bikes, whilst the guys run into obstacles as they restore an old classic.

Senior's vintage chopper is unveiled at a photo shoot for Barnett's Magazine, while Chris Matthews finishes restoring an old classic.

The crew work on a bike unlike anything they've built before - a bike that will be auctioned off to benefit the Dave Thomas Foundation for Adoption.

The guys head to Hunter Mountain for some fun on the slopes, whilst the bike to be auctioned is sent to paint and powdercoat.

OCC teams up with Sunoco and Nascar driver Kyle Petty to build a bike that will benefit the Victory Junction Gang Camp.

OCC continues working on its latest build, a bike for Sunoco that will be auctioned off to benefit the Victory Junction Gang Camp.