Palin travelled over 1300 miles through the secretive country, at a historic moment for the region.

The presenter and his crew were in the country during the momentous meeting of North Korean leader Kim Jong-Un and South Korean president Moon Jae-In, and captured the reactions of ordinary citizens.

“The visit was an eye-opener for me, and I'm sure it will be the same for others,” said Palin, who returned from his trip earlier this month. “In all my travels around the world I have never had the same sense of fascination and revelation as on this journey to North Korea.”

The series, which is produced by ITN Productions in partnership with FOMO Films director Neil Ferguson, involved two years of planning and high-level negotiations to allow unprecedented access to the country.

Palin celebrated his 75th birthday while in North Korea, where he travelled from the capital Pyongyang to the snowy peaks of Mount Paektu.

This is his first documentary for Channel 5, having travelled extensively for the BBC in regions including the Sahara, the Himalayas and Brazil. It will air later this year.

Palin has previously visited the North Korean border with South Korea in his 1997 BBC series Full Circle, which saw him travel around the rim of the Pacific Ocean.