More than 20,000 people enter Australia every day be sea and by air. How many of these people are really who they say they are? Are they there on holiday or do they have more sinister intentions?

The men and women on patrol are literally at the front line when it comes to protecting Australia from drug runners, illegal immigrants and potential terrorists. They are also the last line of defense against harmful pests and disease coming into the country.

To make the series, the crew was granted unprecedented access to all areas of national security - not just at airports, but in coastal waters and mailing centers around the country.

Fly-on-the-wall footage captures the planning and implementation of large scale operations such as major drug and weapons busts, as well as the discovery of strange and bizarre objects people try to smuggle into the country.

In these uncertain times, Border Security will take viewers to the frontline of Australia's national security.