A "radio documentary" is a type of audio program that tells a true story or provides information on a particular topic. It is similar to a documentary film, but it is made for radio instead. Full definition
We also produce an annual season of radio documentaries that air on public radio stations nationwide. (apmreports.org)
A recent BBC radio documentary on the possible over-selling of climate change, focussed on the link between high profile papers appearing in Nature or Science, the press releases and the subsequent press coverage. (realclimate.org)
(Though released on CD by Delos, the disc lacks «Requiem for a Cavalier» - an edited 25 minute audio track from a 1968 Canadian CBC radio documentary on star Errol Flynn, which was also broadcast by the BBC in England, and by ABC in Australia, in a longer 50 minute version.) (kqek.com)