I recently enjoyed the podcast series Agent of Betrayal: The Double Life of Robert Hanssen.

It was well-produced, researched, and sourced.

Although I thought I knew a great deal about Robert Hanssen (Wikipedia), this podcast provided a bunch of new information I was unaware of.

You can listen via:

• Apple iTunes
• Amazon

I also recommend these podcasts from the International Spy Museum in Washington, DC:

• “America's Most Damaging Russian Spy, FBI Agent Robert Hanssen" – with Lis Wiehl
• "FBI Counterintelligence and the Robert Hanssen Spy Case"
• "SpyCast Ep. 610 | Agent of Betrayal, FBI Spy Robert Hanssen with CBS’ Major Garrett and Friends"