Officers in Calais search lorries for illegal immigrants, while at Heathrow Terminal 3, a student is prevented from entering the UK after a trip home to his native India.

New documentary series taking viewers inside the UK Border Agency, revealing the work that takes place behind the scenes of the immigration process. Teams at Heathrow Terminal Three, Calais, Dover and across the North West and North East of England reveal the methods and technology used to allow legitimate visitors safe passage while catching those who try to gain illegal entry to the UK.

Officers at Heathrow Terminal Three question a passenger from Johannesburg arriving in London on a tourist visa, suspecting he may actually be coming to work in the country. Entry Clearance Officer Dan Brown, on secondment to the British High Commission in Delhi, encounters a man carrying false identity documents - an arrestable offence.

Immigration officers at Heathrow's Terminal Three investigate a Jamaican man they suspect is a drugs mule after a suspicious x-ray examination. At a London Underground station, a suspected illegal immigrant tries to run from officers, but his escape is hindered by a member of the public.

Officers search UK-bound lorries and discover illegal immigrants during rush hour at Calais, while in the UK police target illegal workers as they raid a chicken factory.

Documentary series taking viewers inside the UK Border Agency, revealing the work that takes place behind the scenes of the immigration process. Teams at Heathrow Terminal 3, Calais, Dover and across the North West and North East of England reveal the methods and technology used to allow legitimate visitors safe passage while catching those who try to gain illegal entry to the UK.

Documentary series taking viewers inside the UK Border Agency, revealing the work that takes place behind the scenes of the immigration process. Teams at Heathrow Terminal 3, Calais, Dover and across the North West and North East of England reveal the methods and technology used to allow legitimate visitors safe passage while catching those who try to gain illegal entry to the UK.

The Manchester enforcement team conducts raids in Rochdale, searching for illegal workers, and a man is deported to Nigeria. Last in the series.

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A Guyanan couple take on the identities of a British couple who emigrated to the United States years before, then defraud the UK public of 100,000£. An Indian young man can't recall the name of his college or any of the coursework he claims to have done. An Australian man into leather finds his fetish isn't what concerns officials.

Observational documentary series. Access is gained to an Immigration Removal Centre, where the UK Border Agency is implementing Operation Aardvark, a mass deportation on a specially chartered flight.

Observational documentary series. This episode ventures into 'The Jungle', a piece of scrubland in Calais where asylum seekers lie in wait for trucks heading towards Britain.

Observational documentary series. Exclusive camera access inside the British High Commission in Lagos, Nigeria. The staff at a West End steakhouse are grilled.

Observational documentary series. Officers stop a Nigerian with a forged passport who insists he is 15 years old. A transgendered woman suffering from terminal cancer and with just $10 to her name finds out if she qualifies to get into the country. A criminal is caught in Calais.

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