First broadcast July 2006
As improving technology, communications and travel mean that the world gets closer, the global crime scene also gets better connected - making it easier for criminals to conduct their activities internationally.
But global police forces are working hard to catch up, and British detectives are forging links with investigating forces abroad to combat corruption, fraud, sex trafficking and international car crime.
Part One: Fraud and Corruption
Investigators from Lagos and London have linked up to combat corruption and fraud in Nigeria and the UK.
One famous crime is known as the "419" - which describes the penal code for worldwide fraud. It involves sending emails to potential victims and sucking them into a highly attractive - but utterly false - financial deals.
Meanwhile money meant to improve the infrastructure for ordinary Nigerians is finding its way into the personal bank accounts.
Reporter Jenny Chryss follows the globe-trotting specialist detectives trying to stop these crimes.
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