Mike and Danielle scour a sensory-overload attic in Detroit; Jersey and Robbie follow a random lead to a late collector's mighty stockpile.

In the thumb of Michigan, a homeowner's inventive great granddad left behind a cutting-edge property complete with a custom zip line, water park, and private speakeasy; at a defunct museum down the road, Danielle closes in on a claw-foot bathtub.

Mike makes a return pilgrimage to Rick's Michigan honey hole. And this time he's determined to seal the deal on a ratty t-shirt and futuristic one-of-a-kind bubble car--no matter how big the price tag. Down the road, Robbie and Jersey comb through a late collector's sprawling workshop where everything is ups for grabs including a bright green dune buggy.

Mike uncovers a mind-blowing collection of vintage baseball cards in Kansas; Robbie and Jersey try to broker a deal in Tommy's "black hole of stuff."

A mind-blowing Alabama collection includes a century of salvage; in Mississippi, Robbie dives into the remains of a family's carnival empire.

Mike and Jersey visit a flea market junkie in Louisiana while Robbie and Danielle scour a jam-packed Arizona property where nearly everything is for sale.

In Louisiana, a seasoned collector and his grandson open the doors to a pool hall-turned-catch-all where Mike uncovers an ultra-rare pinball machine; in Mississippi, Robbie and Jersey scour an epic property with tons of outbuildings.

A Wisconsin collector's oversize storage units feature a variety of items; a former drag racer opens the doors to his museum-quality stockpile of petroliana featuring homemade engine cutaways, a stable full of early Chevrolets and a must-have pickup.

In Alabama, Mike goes hog wild for a super-rare, barn-fresh Shelby Mustang while Dani and Robbie visit a New Mexico town that's determined to remain a roadside attraction.

Mike and Jersey uncover a massive collection of petroliana in Alabama while Dani and Robbie hit an Arizona property with killer steam engines as far as the eye can see.

On Uncle Butch's ten-acre homestead in Wisconsin, the Wolfe brothers pay big money for some rare nuggets of petroliana but strike out on a jaw-dropping ride with a Hollywood pedigree. Flying solo in Milwaukee, Mike meets the 97-year-old inventor whose life-like automatons tell the story of America's all-time favorite characters.

In the heart of beer country, the Wolfe brothers find the motherlode of breweriana, the granddaddy of all pinball machines, and Elvis inside a Milwaukee collector's suburban home. Down the road, Mike and Robbie make a return pilgrimage to an Illinois honey hole to dig through five generations of history in a century-old mansion full of treasure.

Mike visits the Virginia birthplace of a high-speed camera that changed the world. Meanwhile in Nashville, a music guru has some sobering news about Danielle's rock'n'roll gamble.

In the California desert, the Wolfe brothers comb through a late photographer's eclectic hide-away and enter a sprawling ranch that's home to a must-have holy neon beacon.

The Wolfe brothers drop in on an historic San Francisco hotel that's home to an awesome collection of classic cars and uncover a hidden stash of spooky carnival relics.

The Wolfe brothers uncover an overgrown vintage Cadillac graveyard in the woods, and peel back the layers of a gargantuan California stockpile.

Robbie unveils his sprawling retro garage, and in Southern California, the Wolfe brothers come face-to-face with the King of Signs and uncover the Holy Grail of 3D signs.

Mike, and Robbie head for the Hollywood Hills to pick a once-in-a-lifetime stockpile of amazing movie memorabilia.

Mike and Robbie visit an old-school general store filled with country road gold. And a serious collector opens the doors to his empire of vintage coin-op scales.

A California almond farm serves up a hidden stash of retro surf shop relics, and a Prohibition-era bowling alley in L.A. offers a mind-blowing trip back in time.