Steve Punt returns as Radio 4's very own private detective.

In this tenth anniversary edition, Steve's called in to investigate the unlikely disappearance of American and Russian nuclear weapons - with assistance from best-selling thriller writer Frederick Forsyth.

At first, Steve's sceptical - surely no nuclear power could actually lose possession of weapons capable of causing Armageddon. But as his investigation gathers pace, the story starts to becomes rather disturbing.

From an H-bomb lost over Savannah, Georgia to a cache of so-called 'suitcase nukes' which rumours suggest could still be stashed in modern day Moldova, Punt weighs up the evidence - with a little detour via Dorking...

Producer: Laurence Grissell.