In The Garage

Senior and Junior begin restoring a 1951 Buick, but they don't always go by the book; Senior risks everything by moving designs away from their famous choppers; Junior challenges himself to build a streamlined bike for the MLB Network.

Senior takes on a build for a Vietnam memorial, determined to create a bike worthy of history; Junior is hired by Martin Guitar to design a massive reverse trike, an undertaking that pushes his team to their limits.

Senior and his team struggle to deliver a vintage-style bike on time; Junior deals with the complicated assembly of the Martin Guitar reverse trike; Senior surprises Junior with the first theme bike they ever built.

The Monkeys race to finish their first big build without Aaron; Richard tries to unload his '65 Shelby Mustang GT with a frozen engine.

Richard brings in Gas Monkey's first guest builder; Dallas hot-rodder Brian Bass teams up with the Monkeys to build a '60s style hot-rod out of a '34 Ford Coupe.

Brian Bass and the Monkeys go over schedule on their '34 Ford Coupe; Richard strikes a deal to feature the Coupe in Hot Rod Magazine.

After 2017 Daytona 500 winner Kurt Busch makes a surprise visit to Gas Monkey, Richard strikes a deal to build him a '72 Pantera to race against fellow NASCAR champion Joey Logano.

Richard's plan to reveal the Krew Kut Dually at the Lone Star Throwdown hits a snag when rain forces him to come up with a new plan to re-introduce it to its fans.

Actor Chad McQueen hands a huge challenge to Richard Rawlings and the Monkeys, asking them to take a 1968 Fastback Mustang and turn it into the iconic muscle car for a recreation of Steve McQueen's iconic chase scene from the movie, "Bullitt.".

Richard Rawlings and the Monkeys forge gear-head history, packing a 1979 Scout with a 707 horsepower Hellcrate engine and scoring a record-breaking payday; after the Feds bust its owner, Richard may pony up to reclaim his old Ferrari Dark Horse.

The Monkeys race to be the first ever to drop a Hellcat motor in their 1979 International Scout and fulfill hot-rodder Richard's quest to fetch a world record for the most expensive ever sold; Richard urges a friend to buy a 1963 Stingray.

Heavy D decides to test the physics abilities of the shop and build a somersaulting truck to use for viral videos; The Muscle takes over a flip from Heavy D and turns a Dodge Ram into a modern pop-up camper.

The Diesel Brothers come up against the clock for their SEMA build: a replica Ford Bronco made from an F350 and an Excursion; Heavy D brings in physics help to make his dream of a somersaulting truck come true.

The Dieselsellerz SEMA build hits a snag, and the guys scramble to find a replacement; they decide to rebuild and give away their most iconic build, "the Megaram.".

The Diesel Brothers attempt to dieselfy a Prius, try their hand at bull riding, and almost lose Chet in an unfortunate dolly race.

Heavy D, Diesel Dave and the DieselSellerz crew reinvent a bullpen car for the MLB Network while working on a Chevy Duramax for baseball legend Miguel Cabrera.

Heavy D's plan falls apart as he strives to turn a Cummins-swapped K5 Blazer into a one-of-a-kind off-road showpiece with a matching trailer for a big client; Sam builds a dangerous mini bike.

The Diesel Brothers complete their transformation on an old K5 Blazer and square body truck bed into the ultimate diesel-powered party on wheels; Diesel Dave convinces Heavy D to give his El Camino what it needs to get back on the road.

Heavy D puts the pedal to the metal on his next SEMA build, a 6x6 with a custom full-track assembly that can handle any terrain in style; Diesel Dave puts finishing touches on his dream El Camino before revealing it at Monster Jam.

Heavy D sends Diesel Dave and The Muscle on a secret late-night mission to the spooky overflow lot; however, completing their task becomes difficult when they remember all the builds they've done throughout the years.