I found a recording [1], and it's clear to anyone who listened from the beginning that it was a radio drama. An announcer introduces Welles and the Mercury Thea

I found a recording [1], and it's clear to anyone who listened from the beginning that it was a radio drama. An announcer introduces Welles and the Mercury Theatre on the Air, and then after some intro music, Welles narrates a prologue. I suppose, though, that people joining the broadcast after that opening could have been fooled. [1]: https://www.youtube.com/watch?v=h5uEA21-_Yo https://www.youtube.com/watch?v=h5uEA21-_Yo