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

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.

We meet the tractors designed for snow, designed for steam and designed to save lives.