Commander Lioinel 'Buster' Crabb was Ian Fleming's inspiration for James Bond. A British naval frogman, Crabb disappeared under mysterious circumstances in 1957 following a secret dive beneath a Russian warship which brought Soviet leaders Khrushchev and Bulganin to Britain. Fifty years after the event, award-winning investigative journalist Don Hale uncovers who sanctioned Crabb's final dive in a case which claimed the jobs of Admiralty top brass and Intelligence people and contributed to the downfall of Prime Minister Anthony Eden.