Senior deals with the death of his mother and is hurt then he does not hear from Junior or Mikey. While PJD starts a build for One Call Concepts, OCC unveils a gold bike for Donald Trump.

OCC builds a bike for Veterans Airlift Command and PJD finishes a bike for One Call Concepts. After his mother’s death, Senior is more determined than ever to reconcile with Mikey and Junior. He invites Mikey to join him at a painting class.

Junior decides to revamp the Black Widow bike he recently reclaimed from Senior while OCC works on a two-bike build for John Christner Trucking. Mikey hires a personal trainer to lose weight and Rick announces his engagement.

After weeks of silence, Junior finally calls Senior to give his condolences on Helen’s passing. Meanwhile, PJD starts a charity build for the March of Dimes while OCC finishes a two-bike build for John Christner Trucking.

Mikey launches a "Fill the Diaper" fundraising campaign for March of Dimes, OCC starts an eco-friendly build for CIMA Green and PJD unveils the March of Dimes bike. Meanwhile, Senior takes bold steps to reunite with his sons.

After receiving a puzzling text from Mikey, Senior calls Junior to make amends. PJD starts a build for Newmont Mining while OCC unveils a bike for CIMA Green. Then, Junior asks Senior for a face-to-face meeting, sans cameras.

OCC starts a 1970’s themed build for MyPillow while PJD puts the finishing touches on a bike for Newmont Mining. Then, there is promise that all the family drama could finally end as Senior and Junior agree to meet in person.

Junior and Senior ditch the cameras and finally meet face to face to discuss their relationship. Meanwhile, at the shop, OCC finishes a bike for MyPillow and PJD starts build for an MLB outfielder.

OCC starts a build that will be unveiled to the Prime Minister of Malaysia while PJD finishes a pimped out bike for baseball player Aaron Rowand. Then, Mikey drops an unexpected bomb when he considers quitting the show.

The OCC crew embarks on a Malaysian adventure where their latest build is unveiled. While overseas, Senior, Jason, Jim and Steve encounter wildlife, swim under waterfalls, and barter at the central market.

PJD starts a build for Skil Tools while OCC begins a bike based on an Italian sports car. Junior makes a huge decision that could finally end his estrangement from Senior once and for all.

OCC finishes the Italian sports car bike and PJD unveils the Skil bike. Mikey leaves the show once and for all. And Junior goes to OCC to confront Senior face to face in an explosive meeting.

Senior proposes that he and Junior combine forces to build a bike, but Junior is unsure of how to respond. When Rick’s wedding brings the two together, Junior gets the reassurance to make a decision once and for all.

Senior and Junior brainstorm bike styles for their upcoming collaboration and decide to recreate the first bike they ever built together. PJD unveils the Geico Armed Forces tribute bike and OCC reveals the Café bike at the opening of OCC Café.

Senior and Junior get to work on their big bike build, which reaps surprising results as the two bond over old memories. Meanwhile, PJD starts a trike for Loopster while OCC builds a bike to benefit Senior’s favorite charity.

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.