David and Chana's toxic asset, which has acquired the nickname Toxie, gets sick. And the payments that it's supposed to provide them every month stop.

Planet Money reporters David Kestenbaum and Jacob Goldstein went to Kenya to see the work of a charity called GiveDirectly in action. Instead of funding schools or wells or livestock, GiveDirectly has decided to just give money directly to the poor people who need it, and let them decide how to spend it.

David and Chana buy a toxic asset, from a guy named Wit Solberg, who used to work on Wall Street and now helps small banks who've been saddled with toxic assets. Turns out...it's hard to buy a toxic asset.

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.

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.

Alex Blumberg and Adam Davidson tackle a very tough subject: Trying to explain exactly what a bank is and does. They talk to a number of experts about what has gone wrong in banking, but not before bringing us all up to speed on some banking basics, like understanding a bank balance sheet, and a bank's assets and liabilities, and the squishy business of what banks say about their balance sheets compared to what they are.Alex and Adam walk us step by step through the complications of the US government buying up bad assets from banks, and explain why, when it comes to footing the bill, the government might just prefer to not be in charge of the very banks it is having taxpayers bailout.

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. Executives at Intellectual Ventures insist they are not trolls, but rather, promoters of innovation.