This is probably the best podcast ever made. Both seasons 1 and 2 were entertaining from start to finish. They explore cold cases where there seems to be some unanswered questions that leave doubt in anyone's mind. This show took a turn for the worse in collaborating with 'This American Life' and creating 'S-Town'. I'm hoping 'Serial' comes back with a season 3, unencumbered by collaborations.
It's this podcast that first captured my interest & began my journey into the world of podcasts. Very thorough on the research for both season 1 & 2! I am eagerly awaiting season 3!