Isaac Asimov's The Foundation Trilogy was adapted for the BBC Radio 4 in eight hour-long episodes by Patrick Tull (episodes 1 to 4) and Mike Stott (episodes 5 to 8), directed by David Cain, first broadcast in 1973, and repeated in 1977 and 2002.

YOU CAN FIND THE ORIGINAL RADIO PROGRAMME ON THE INTERNET ARCHIVE

THE WIKI PAGE ALSO HAS SOME INTERESTING INFO