Ep 5. Series 3, Episode 5

In Series 3, Episode 5 of Top Gear, the hosts take on their biggest challenge yet as they attempt to drive from Switzerland to Blackpool on just one tank of fuel. They start off by selecting their cars - Jeremy Clarkson chooses a diesel-powered Jaguar XJ6, Richard Hammond opts for a Volkswagen Polo BlueMotion, and James May drives a Lexus LS 600h with a hybrid engine.

The journey starts off smoothly, but soon the hosts discover that the route they have chosen is not as straightforward as they had hoped. They encounter steep hills, winding roads, and heavy traffic, which all take a toll on their fuel efficiency. As they race towards Blackpool, they must also contend with the pressure of knowing that their whole experiment could fall apart at any moment.

Along the way, the hosts also take part in a series of challenges designed to test their cars' fuel efficiency and handling. These challenges include a race to see who can drive the furthest on just one liter of fuel, and a test of each car's acceleration and braking capabilities. The hosts also stop off at various scenic locations along the way, including the Swiss Alps and the beautiful Lake Geneva.

As the hosts get closer to Blackpool, tensions run high as they begin to worry whether they will make it to their destination on time and on one tank of fuel. They encounter one final obstacle - a long, steep hill that threatens to use up the rest of their fuel reserves. With the finish line in sight, the hosts summon all their driving skills and determination to make it to Blackpool and complete what turns out to be their toughest challenge yet.

Overall, Series 3, Episode 5 of Top Gear is a thrilling and entertaining adventure that will keep viewers glued to their screens. With its stunning scenery, high-stakes challenges, and hilarious banter between the hosts, this episode is a must-watch for fans of the show and anyone who loves a good road trip.