Saudi Arabia's human rights record is firmly back in the spotlight. A teenage boy on death row for protesting. A British pensioner expecting to be lashed. Britain no longer willing to help train those running the Kingdom's jails.

Our subject this week - Saudi interior minister Prince Mohammad Bin Nayef - is right in the thick of it. Mark Coles profiles the man who is a crucial counter-terrorism partner for Britain and United States, and a hardliner who is next in line to the Saudi throne.

Producers: Chloe Hadjimatheou and Katie Inman.