Alex Blumberg and NPR correspondent (and "Planet Money" reporter) Dave Kestenbaum examine what went wrong with the credit ratings agencies. When all these financial instruments that brought down our economy—the mortgage backed securities, the derivatives—were originally issued, the rating agencies (Standard and Poors, Moody's and Fitch) gave many of these things their top rating of triple-A.

Producer Alex Blumberg tells the story of an ex-con-turned-actor named Richie Castellano. After a bit role in the movie Analyze This, he moved to a small town and got dozens of people to invest money and time in a movie that never premiered.

NPR reporter Laura Sydell and This American Life producer/Planet Money co-host Alex Blumberg tell the story of Intellectual Ventures, which is accused of being the largest of the patent trolls. The investigation takes them to a small town in Texas, where they find a hallway full of empty companies with no employees.

The dramatic conclusion to Laura and Alex's search for information about Intellectual Ventures, and the inventor they claimed they were helping, Chris Crawford. The story turns out to be different than the one Intellectual Ventures originally told.