United Kingdom, June 2 -- Boyzone's Keith Duffy believed he and his son were going to die when they were caught in a rare snow blizzard in Africa.

The 51-year-old singer and his actor son Jay Duffy - who stars in Amazon Prime series The Wheel of Time - feature in the next season of Uncharted with Ray Goggins, and in the final episode the pair attempt to tackle one of Africa's highest peaks of the Rwenzori Mountains located in Uganda over seven days.

Keith was terrified when he and Jay, 30, were blasted by extreme minus-20 degree snow and feared they would not survive the icy weather.

Appearing on RTE Radio 1 show Sunday with Miriam, Keith said: "I'm not gonna lie, I was terrified. More so that I had my son with me, and if I was fearful...