The line-up includes former Taoiseach Leo Varadkar, who teams up with singer Lyra to travel with Ray to the wild untamed mountains of Drakensberg, South Africa. The unlikely trio sleep in caves, scale gigantic peaks and climb sheer rock faces as they make their way to the top of one of the tallest waterfalls on the planet, Tugela Falls. No stranger to scaling political heights, how will Leo fare when faced with a death-defying vertical climb to the top of the Drakensberg Escarpment?