Crews race to complete work on three bikes in the series finale. Meanwhile, a revengeful prank is pulled on OCC.
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Impasse
Season 4, Episode 13
PJD encounters problems with the 9/11 Memorial bike; Senior and Junior open old wounds.
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The 9/11 Memorial bike is endangered by Hurricane Sandy. Also: Senior confronts Vinnie about their differences.
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Old Wounds
Season 4, Episode 11
Junior and Senior disagree on the production bike design process.
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Senior makes business decisions without Junior's approval; PJD and OCC unveil projects.
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Senior and Junior don't see eye to eye while brainstorming ideas for their production-bike project.
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Junior and Senior discuss potential future business collaborations; PJD finishes a bike for RoadLoK; and OCC begins a super-bike build.
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Senior is lectured by a celebrity; Junior launches a new business venture; and Senior visits PJD for the first time.
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OCC begins a build for the Sturgis Motorcycle Rally; PJD unveils a bike that was built for a technology company; and Senior and Junior complete their bike build.
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PJD begins a build for a technology company; OCC unveils the Wildgame Innovations bike; Senior and Junior continue their bike build.
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Senior and Junior bond during their bike build; OCC begins working on a bike for Wildgame Innovations; PJD reveals a five-wheeled trike for Loopster.
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Senior and Junior reminisce while working on their big bike build; PJD begins work on a trike; and OCC builds a bike for Senior's favorite charity.
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Senior and Junior decide to recreate the first bike they ever built together; PJD reveals the Geico Armed Forces tribute bike; and the OCC Cafe opens.
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In the season premiere, Senior proposes that he and Junior collaborate to build a bike for charity.
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