The show is back with five teams racing across many countries for £20,000. They have to give up their phones and credit cards.

This season, the teams will travel over 12,000 kilometers through many countries to get to a village in Mongolia.

One competitor, Margo, had a big problem on her own trip before the show.

Margo had trouble on a solo trip.

Margo told the BBC about her scary trip to Costa Rica.

Someone tried to rob Margo with a knife. She was told not to go out late, but she did. It was her fault, not Costa Rica's.

Margo was doing many adventurous things and didn't take a backpack, just a suitcase.

Margo talked about her sister Julia, who didn't like backpacking. Margo likes backpacking.

Margo and her brother-in-law are on the show together.

Margo used to travel by train when she was young, but not anymore.

Margo and Mark talked about their relationship and how they helped Julia.

Mark said the show is a way to keep caring for Julia. Margo would visit Julia in the hospital.

Margo comforted Julia, and Mark took care of the practical things.

The show is on tonight at 8pm on BBC One and iPlayer.