I enjoy these episodes for their entertainment value.
This one is particularly good: http://www.radiolab.org/2010/dec/14/
The podcast investigates the nature of moral “good”. Good is equated with altruism and selflessness (a common mistake), but the presenters don’t hide this fact. So in effect the show should have been titled “altruism”, and this is why it is interesting. I was particularly fascinated by the section on George Price. see “The price of altruism“