Are you fascinated by the unknown, the unknowable, or the unbelievable? Given the number of true crime podcasts and murder mystery shows on the internet, many people are. These are the best mystery podcasts you should be listening to.

On March 18, 1990, two men in police uniforms entered the Isabella Stewart Gardner Museum in Boston and left with 13 paintings worth a total of $500 million. What happened next? Hosts Tim Pilleri and Lance Reenstierna examine the facts, theories and historical significance behind America's largest unsolved robbery.

If you’re reading this list, chances are you’ve heard of Serial . From the creators of This American Life , the Peabody Award-winning podcast topped the iTunes charts for months. While the first two seasons each focused on a single true crime story, the third season covers multiple crimes that took place in Cleveland, Ohio. The creators also have a second show, The Improvement Association , in case you’re left wanting more after watching this one.

Unfound features interviews with friends and family members of people who have disappeared under mysterious circumstances. The hosts engage in real investigative journalism to develop new theories and leads in cold cases.