For questions about a "Radio Play" or Radio Drama, a dramatized, purely acoustic performance, broadcast on radio or published on audio media, such as tape or CD. Use in conjunction with [story-identification] to specify the media or to disambiguate between various adaptations of a work, for example with [the-hitchhikers-guide-to-the-galaxy].
From Wikipedia for 'radio drama':
Radio drama (or audio drama, audio play, radio play, radio theater) is a dramatized, purely acoustic performance, broadcast on radio or published on audio media, such as tape or CD. With no visual component, radio drama depends on dialogue, music and sound effects to help the listener imagine the characters and story: “It is auditory in the physical dimension but equally powerful as a visual force in the psychological dimension.
In our context, there are a number of significant science-fiction performances and publications that are significant in 'radio play'. Orson Welles' War of the Worlds is a notable one. Many users' first experiences with Hitchhiker's Guide to the Galaxy was via radio-plays.