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Babbling Sean Kelly is the auction host with the most on the south coast, where an uplifting prize gets the offers rolling. John gives Nat flak for blind bidding.

Auction anarchy in Wales, where the bidders hope to get rich quick by bagging valuable storage lots. It's cloak-and-dagger stuff as spying equipment is on offer.

Legendary train driver Bernie Baker needs all the diesel muscle he can muster when he takes five Streamliner locos on an epic odyssey across the outback.

Bernie's odyssey goes horribly wrong, two veteran locomotives risk destruction in a race for glory, and a mega-train faces the steepest grades in Australia.

Creativity and crashes as the motor-less mayhem continues. Crews of enterprising amateur racers steer their screwball soapboxes through the streets of Seattle.

It's going downhill fast in northern Italy, where 65 nutty teams pit their wacky homemade racers against a 500m-long track. Will any petrol-free motor be a runaway success.

Guy Martin buys a Royal Enfield bike with a traditional Hindu blessing at a Delhi market, visits Asia's biggest truck yard, and sleeps among rats as he waits for a late train.

Guy Martin clambers up India's tallest building and has his preconceptions about slums challenged in Mumbai before heading to Goa and the Rider Mania motorbike race.

Adam leaves his home waters in search of Dover sole hoping to cover his ever-growing expenses, and Stephen breaks from the fleet towards stormy weather in Scotland.

Old friends and fellow comedians Johnny Vegas and Lucy Beaumont take on perilous mountain drops and sheer cliff edges in a hair-raising trip on Montenegro's roads.

The adventurer travels to the vast white salt flats of Bolivia, through the world's greatest wetlands of Brazil's Pantanal, and on to the forested heart of Paraguay.

Bob Mortimer returns to his childhood roots in Middlesbrough to fish the Rivers Esk and Tees with his dear friend and angling mentor Paul Whitehouse.

A tip-off unearths a vast shipment of heroin and cocaine disguised as garbage bags, and officers respond to a medical emergency and deal with a drunken US Marshal.

When Lee goes to watch Benji playing football for a local under-13 team, he becomes the competitive dad that all other parents want to avoid.

Lee makes a big effort to create the perfect Christmas for his family by agreeing to Lucy's wish to do something charitable and inviting a lonely old pensioner to join them.

Ria Lina introduces comedians Lucy Beaumont and Josh Pugh to the stage.

Guest host Steph McGovern, comedian Jamie MacDonald, and mathematician Professor Hannah Fry join team captains Paul Merton and Ian Hislop as they delve into the news.