8th Grade Humor: On home turf in Iowa, Mike and Frank hit a honey hole of vintage toys. Plus, Mike spots an item so unusual he's willing to take a huge gamble. (S4, ep 10)
Motor City: The pickers get carried away in Michigan, where they swap a wad of cash for cars, bikes and cool advertising. But what will the appraisers make of their purchases? (S4, ep 9)
Automotive Archaeology: The guys find original advertising and petrol station memorabilia in Michigan. Plus, they cut a sweet deal on an exciting piece of car history. (S4, ep 8)
Urban Cowboys: The guys are let loose in country musician Mickey Gilley's jam-packed warehouse, where they spot a sign for the honky-tonk club in the 1980 film Urban Cowboy. (S4, ep 7)
Frank's Pacemaker: Miles from home, the guys are desperate for the item that will make the long trip worthwhile. Could it be a macabre embalming table with a long history? (S4, ep 6)
Pinball Mania: The guys feel their way through a powercut for old arcade games. A hoard of motorbikes sends their hearts racing, but what can they do if they're not up for sale? (S4, ep 5)
Motor Mayhem: Rick takes on the tough task of overhauling a 1800s coffee grinder and tunes up a highly-collectible fishing boat motor from the 1930s. (S4, ep 2)
Cannonball Safe: Nimble-fingered staff in Rick's miracle-producing workshop in Las Vegas have their work cut out as they attempt to restore a colossal 1920s cannonball safe. (S4, ep1)
The Return Of Hobo Jack: The guys return to the home of legendary collector and tough negotiator Hobo Jack, a huge and disorganised junk yard packed with big ticket items. (S4, ep 25)
Boys' Toys: During a great day's picking, the guys find a 1947 Harley-Davidson Knucklehead and are given VIP access to the untouched stash of a former antique-shop owner. (S4, ep 24)