On 30 October 1938, Welles and The Mercury Theatre on the Air presented a radio adaptation of The War of the Worlds, a late 19th century science fiction novel by H.G. Wells which depicted a Martian invasion of Earth. (DS9 short story: "Captain Proton and the Orb of Bajor")
The broadcast caused a mass panic in the United States of America as many believed that it was in fact a news report about a real Martian invasion. James Wainwright, who was then 21, did not hear the broadcast but read about it in the newspapers the next day. On 23 September 1947, Professor Jeffrey Carlson told him that there was a theory that the broadcast was used as a cover story for the discovery of an actual alien spaceship. However, Wainwright dismissed this theory, branding it "crazy." (TOS novel: From History's Shadow)
- Welles narrated the teaser trailer and television advertisements for Star Trek: The Motion Picture in 1979.