The Armstrong Circle Theater (“UFO: Enigma of the Skies”) interview (CBS) was conducted on 22 January 1958 and the The Mike Wallace Interview (ABC) was conducted on 8 March 1958 (see the Wikipedia and Television Obscurities articles).
(Search term: Donald Keyhoe “Armstrong Circle Theater”)
(Donald Keyhoe “The Mike Wallace Interview”)
Wikipedia article: “Donald Keyhoe”:
Television Obscurities article: “The Mike Wallace Interview”:
The late Major Donald Edward Keyhoe, U.S. Marine Corps,
NICAP Director, UFO Author & Researcher