Klop Ustinov was Britain's most ingenious spy condemned U35. He wasn't licensed to kill, he was authorised to tell tall stories that bemused and beguiled the enemy into revealing their deepest secrets. From the Russian Revolution to the Cold War he bluffed and tricked his way into the confidence of Soviet commissars and Gestapo Gruppenfuhrer. He passed on his talent as a raconteur to his famous son, the actor Peter Ustinov, but Klop's untold story is more amazing and entertaining than any of Peter's chat show anecdotes.