The inconspicuous MV Krait ferried 14 special operatives thousands of kilometres behind enemy lines into Singapore harbour during World War 2 to blow up enemy shipping right in the heart of Japan's wartime stronghold. The men involved in this extraordinary raid included some from the top secret, so-called 'Z Special Unit'. For 91-year-old Z Special veteran Douglas Herps, telling the story of MV Krait, and preserving it for future generations, has become his final mission. Into the Lion's Den also introduces Roma Page, whose husband Bob Page was on board MV Krait. She only came to understand Bob's bravery and ultimate fate many years later.