Getting to grips with the biggest, fastest and most powerful tractors on the planet, including those in Alaska, Florida and the UK.

Ch1: Big, Bigger, Biggest
There's a look in Montana at the biggest tractor ever built, a self-driving tractor with pinpoint precision in Cambridgeshire and a report on the sport of tractor pulling from Florida.

Ch2: The Fast and the Furious
In Staffordshire, cameras follow the engineers behind the world's fastest tractor - the JCB Fastrac 2, which has clocked 150mph - and see it in action. Off the coast of Devon, there's a look at the 53-year-old Burgh Island sea tractor, custom built to transport passengers across the waves and into the lap of a luxury hotel.

Ch3: Full Throttle
A look at the tractors designed for snow, and for steam and those designed to save lives. In Burnham-on-Sea, cameras focus on the RNLI's Talus M8, which has been designed so it can head into the sea - even when the waves are lashing hard - and launch its lifeboats. Meanwhile, in Minnesota, viewers meet Kory, who has brought back to life a legend from the steam age, the Case 150.