Eight Go Rallying: The Road to Saigon - Season 1

In the first episode, the celebrity pairs are plunged straight into the busy rush hour of northern Thailand's biggest city, Chiang Mai, with only an obscure Tulip Map to guide them onto the open roads and up over the phenomenally steep Chae Son Hills.

In the second episode the duos are back on the road after two of the cars were taken out of action in the first leg. To avoid getting left behind they must all make a dash for the border, as the whole rally has to pass into Cambodia by early afternoon. Then Noel and Liz and Andi and Miquita must drive into the night on the country's challenging roads to reach the tourist mecca of Siem Reap.

In episode three the teams head towards Phnom Penh, at the start of a three-day journey across Cambodia totalling an eye-watering 900 kilometres. The first day of the journey through the rugged countryside is broken up by a pit stop at the official rally lunch stop - a market which sells insects and spiders as snacks.

Once in Phnom Penh Tinchy and Jordan pay a visit to the notorious S21 prison, where thousands of Cambodians were tortured during the brutal rule of the Khmer Rouge, while Andi and Miquita and Martin and Shirlie visit the infamous Killing Fields. Noel and Liz find some hope amongst the horrors of the past, and all of the teams are deeply touched by their experiences.

Heading off for the next leg, they are faced with one of the longest and toughest drives of their itinerary. The Edmonds prove their rallying spirit, whilst others are afflicted by fatigue and ill health. Finally all four teams cross the border into Vietnam - and Martin shares his memories of his darkest moments with Jordan and Tinchy.

Having made it to the South China Sea all the teams have the finish line in their sights. But with 800km before they reach the chequered flag anything can happen.

Noel and Liz are worried about the wear the past 2,500 km have had on their MG, Andi has struggled with the long hours behind the wheel and Tinchy and Jordan are determined to prove themselves now they've got a new "classic" car - a Soviet era Jeep.

The teams travel along Vietnam's spectacular coastline and through its stunning paddy fields before making a final dash for the closing ceremony in Saigon, but the last day brings the brink of disaster for one unlucky team.