Milking It: The team struggle to restore two rusty kiddie handcar trains. Plus, Ron and Tyler get to work on a 1950s milk vending machine, but will their efforts churn a profit? (S3, ep 18)

Smoking Hot: The guys put all their skills and expertise to the test, as they are challenged to restore a 1940s children's Irish Mail cart and a potbelly stove from 1881. (S3, ep 17)

Surfing The Strip: Crippled by a tight budget, Rick and his team attempt to overhaul a 1900s chemical cart. Plus, a 1940s motorised surfboard is in drastic need of a revamp. (S3, ep 16)

Bikes & Barbecues: The guys look to buy and restore a 1940s Japanese Maruishi bicycle and a vintage Chiclet sweet vending machine. (S3, ep15)

Underwater Worlds: Ruins in Peru support legends of a sunken UFO base and Indian texts talk of water worlds populated by aliens. Could aquatic cities prove that aliens visited? (S2, ep 10)

Unexplained Structures: Could aliens have helped humans build huge ancient structures? Experts ask whether standing stones in France, were a GPS system for ancient spacecraft. (S2, ep 9)

Angels And Aliens: Biblical texts describe winged creatures carrying messages from the heavens. But are angels merely the product of the imagination - or do they really exist? (S2, ep 8)

Underground Aliens: From a cave in Ecuador said to hold tablets containing alien knowledge, to an underground city in Turkey, explore supposed extraterrestrial lairs. (S2, ep 7)

The Reckoning - Part 1: With just days left, targets are huge and there's no room for error. Conner Aviation battles for survival and, at Pihl, there's one man who won't survive the week.

Clash Of The Titans: The competition between the logging companies remains fierce as the gap between them narrows. Can Rygaard's new greenhorn prove he's up to the challenge?