The original radio series is being repeated on BBC Radio 4 (also available on-line) from next Tuesday, 3rd May at 18:30 GMT. Most programs are available for a couple of days after the original airing but I can't guarantee this one will be.
Unfortunately for some you need RealPLayer to make it work.
Here's the link:
http://www.bbc.co.uk/radio/aod/netwo...udiolist.shtml