You can now listen online to Part Two of Groucho Was My Father, a three-part series in which Miriam Marx remembers her dad, Dr. Hackenbush. The third and final part airs next Saturday.
Also at the BBC Radio site, they're running a two-part series on The Chaplin Archive, a repository of work left by Charlie Chaplin. I apologize I didn't know about this earlier but as I write this, you have about four hours to go listen to (or if you know how to do it, capture) Part One. Part Two should be in its place after that. Thanks to Jeff Abraham for letting me know.