The world's biggest car programme returns for an explosive and extra-long run of brand new programmes. In this first episode of the series, Jeremy Clarkson, Richard Hammond and James May are in Russia for an incredible race across the vast and very beautiful urban landscape of St Petersburg. May defends the honour of the car in a very small Renault, Hammond tries to prove that pedaling is faster by saddling up a bicycle, whilst Clarkson attempts to demonstrate that water is the quickest way across town, especially if you're in a hovercraft. To make matters more complicated, all three presenters are racing not only each other but also The Stig, who is silently making his way towards the finish line on public transport.

Also in this episode, Richard Hammond is at the test track to find out if the dramatic new Lamborghini Huracan is as flamboyant and fun as an Italian supercar should be.

Plus, celebrity guest Ed Sheeran tests his steely eyed driving skills as the star in the Reasonably Priced Car.

Jeremy Clarkson, Richard Hammond and James May embark on a grand road trip across Australia's Northern Territory.

Tasked with picking a fast, luxurious GT for the trip, Clarkson chooses a BMW M6 Gran Coupe, Hammond a Bentley Continental GT V8 and May a Nissan GT-R, as the trio set out on an adventure that takes in crocodile-infested rivers, a race around a vast open-cast mine, an encounter with the world's longest lorries and the majestic scenery of one of the world's least-inhabited landscapes. Their dusty endeavour concludes with an unusual challenge involving a farm, their cars and 4,000 cows.

Also in this episode, Hollywood legend Kiefer Sutherland is the star in the Reasonably Priced Car.

Jeremy Clarkson, Richard Hammond and James May conduct a valuable piece of consumer research with their attempts to improve and enhance the ambulance.

Starting with a belief that current ambulances, which are usually very big and based on a diesel van, are in need of a rethink, the presenters go their separate ways to focus on the one area they think could be improved. May focuses on passenger comfort, Hammond tries to improve response times by getting other drivers out of the way more effectively, while Clarkson confronts the same issue with the invention of what he calls 'the sports ambulance'.

Their three very different creations are then put to the test with a series of severe and often messy challenges, culminating in a fast reaction to a spectacular emergency.

Also in this episode, F1 driver Daniel Ricciardo is the star in the Reasonably Priced Car.

Jeremy Clarkson tests the new BMW M3 at the track before switching to another BMW, the space-age, hybrid powered i8, for a revealing trip up the A1 to Whitby. When he gets there, and fuelled by a portion of fish and chips, Clarkson must decide which of the two he would rather take for the drive home.

Also in this programme, Richard Hammond marks the imminent demise of the legendary Land Rover Defender with a heart stopping attempt to drive one straight up the side of a dam.

Meanwhile, James May makes a rare trip to the Top Gear track to test the brand new, 500 horsepower Mercedes-AMG GT.

The stars in the Reasonably Priced Car are actress Margot Robbie and Hollywood superstar Will Smith.

In this episode of the world's biggest car programme, Jeremy Clarkson and James May encounter artillery shells, corsets and classic hot hatchbacks as they take a nostalgic look at one of the world's most interesting and varied companies - Peugeot.

Meanwhile, Richard Hammond is at the test track to compare the crisp precision engineering of the new Porsche Cayman GTS with the thunderous all-American muscle of the latest Chevrolet Corvette.

Also in this show, James tests the sensational 950-horsepower LaFerrari hypercar hybrid on glorious Italian roads, and singer Olly Murs is the Star in the Reasonably Priced Car.

Richard Hammond is dropped into the remote, frozen wastes of Canada to test a watch with a built-in emergency beacon. Normally, activating the device would summon a vast international rescue crew, but in Hammond's case, the distress signal is sent directly to Jeremy Clarkson and James May who are disorganised, disinterested and very many miles away. Eventually, the pair get their hands on two machines they believe are suitable for the job and set off on an epic adventure to find their colleague.

Also in this show, Clarkson is on the track in the new 471-horsepower Lexus RC F coupe whilst star of The Fall and The X-Files Gillian Anderson tries her hand in the Reasonably Priced Car.

James May is taken far outside his comfort zone as he straps into an insanely fast, highly tuned, 600-horsepower hatchback and is thrown into the lion's den of World Rallycross racing with Top Gear USA host and professional driver Tanner Foust teaming up with him. As well as trying to fend off a pack of top-flight professional drivers, May's life is made harder by his support crew, the distinctively unsupportive Jeremy Clarkson and Richard Hammond.

Also in this show, Clarkson is at the track in the latest Jaguar F-type R and a sensational, modernised E-type called the Eagle Low Drag GT, while Hammond is in Spain to test the brand new version of the legendary Mazda MX-5.

Finally, Brit Pack acting star Nicholas Hoult tries his hand in the Reasonably Priced Car.

Jeremy, Richard and James attempt to understand the appeal of keeping an old car in the garage and just bring it out on hot summer days. Driving different classic cars they take a drive in the country, and end up at a track day as they try to become true classic car owners. Gary Lineker is the star in the Reasonably Priced Car.