BBC Radio 4 has a programme called "In Our Time". Many episodes of this programme will be of interest to HN readers.

(http://www.bbc.co.uk/programmes/b006qykl)

Epicurianism is going to be broadcast soon. (http://www.bbc.co.uk/programmes/b01qf083)

Here's a list of the philosophy programmes: (http://www.bbc.co.uk/radio4/features/in-our-time/archive/phi...)

And here's the episode for Stoicism: (http://www.bbc.co.uk/programmes/p003k9fs)