One of the stranger early chapters in Koch’s career began with a late‑October night in 1938. Hired by John Houseman for Orson Welles’s Mercury Theatre on the Air, Koch (with Anne Froelick) adapted H. G. Wells’s The War of the Worlds into a radio play titled “Invasion from Mars,” broadcast October 30, 1938. The program’s faux‑news bulletin format—that ripped away the familiar framing of theatre and plunged listeners into the middle of an unfolding catastrophe—did indeed alarm listeners in parts of the United States. Newspapers the next day howled about mass panic and blamed radio drama for unleashing chaos.
But the lurid narrative of nationwide hysteria has largely been mythologized: later scholarship has shown that the panic was real in pockets but far smaller and more localized than contemporary headlines suggested, and that media rivals had an incentive to amplify the story. Koch’s involvement nonetheless cemented his place in cultural folklore; decades later he would write about the broadcast and even work on a never‑finished novel called Invasion from Mars. The episode illustrates both Koch’s knack for theatrical shock and how easily a technological medium and sensational press coverage could create a Hollywood legend—one that persists in popular imagination far larger than the documented reality.
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