America's Doomsday Plan: From atomic attacks to cyber warfare and deadly airborne viruses, discover what the US government is doing to protect its people from danger. (S3, ep 10)
The Secret Service: A look at the scandals that have rocked the secret service, its gruelling selection process and the people and secrets its highly-trained agents protect. (S3, ep 9)
Secret Underground: Uncover the cities and government fortresses covertly constructed beneath American soil, including an advanced network of drug smuggling tunnels. (S3, ep 8)
Billionaire Agenda: Investigation into the growing power and wealth of the US's super rich, including how billionaires' 'dark money' is being used to influence politics. (S3, ep 7)
...of Secrets. Secret Prisons: Documentary exploring the biggest scandals and conspiracies to rock the US prison system, including Pennsylvania's 2008 'kids for cash' scandal. (S3, ep 6)
America's Secret Armies: A look inside the US's secret services. These forces operate in the shadows, but what do they do? And do they have the US's best interests at heart? (S3, ep 5)
The Gold Conspiracy: Experts investigate the secret methods used to control the value of gold and why the US government could be overstating how much of it the country owns. (S3, ep 4)
American Terrorists: A look at the secret measures employed by US authorities to hold back the thousands of terrorists thought to be operating on American soil. (S3, ep 3)
Pain In The Gas. Rick looks for a pair of 1920s visible gas pumps before taking a keen interest in a 1930s horse gambling wheel. (S3, ep2)
Double Trouble: Rick casts his eyes over a 100-year-old mutoscope before Rick's brother Ron and his son Tyler spot a tarnished tandem bike at a client's house. (S3, ep1)