The Serial. This is well worth a listen imo,
http://www.bbc.co.uk/programmes/b04wzyqq think it can be downloaded from itunes also. Running into 12 30min episodes so far, not sure how many in total. Gripping stuff once you get involved.
"Sarah Koenig re-investigates the murder of teenager Hae Min Lee in 1999. Hae's ex-boyfriend Adnan was convicted but has always maintained his innocence. Sarah looks for new evidence and the true story"