Presented by Rene Cutforth
On 23 March 1929 the U.S. Coastguard sank the British schooner 'I'm Alone' in the Gulf of Mexico. They suspected her of rum-running. The U.S. authorities, condemned by international opinion, needed proof that the 'I'm Alone' was working for an American gang. To find it they called in Mrs Friedman, America's top code-breaker.
Taking part in the programme are Mrs Friedman and the Coastguard who sank the 'I'm Alone'.