"Brought together by a father-son bike build, Junior and Senior begin to open up. While their relationship grows away from the shop, OCC starts a bike for Wildgame Innovations and PJD unveils a five-wheeled trike for Loopster.
Senior and Junior brainstorm bike styles for their upcoming collaboration and decide to recreate the first bike they ever built together. Then PJD unveils the Geico Armed Forces tribute bike and OCC reveals the Cafe bike at the opening of the OCC Cafe.
Senior proposes that he and Junior combine forces to build a bike for charity, but Junior is unsure how to respond. But when Rick's wedding brings the two together, Junior gets the reassurance he needs to make a decision once and for all.