A couple of folks enquired about finding the Auxetophone programme on
BBC Radio 4 and I agree that it's not easy to find on the BBC web site.

I dug out last week's Radio Times and found it.  The programme was
called "The Howling Terror Mystery" and was broadcast on Friday 12th
May at 11 A.M.  Go to the Radio 4 section of www.bbc.co.uk and look in
the alphabetic list of programmes.  It should be available for another
couple of days.

Jeffrey Borinsky, London