What? No spoiler alert? ;)
When I posted this here back in 1959 when the episode came out, I had a spoil alert up. :)
It actually was the first-ever episode of the TW. I hadn’t known that til just now.
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“Where Is Everybody?” is the first episode of the American television anthology series The Twilight Zone. It was first broadcast on October 2, 1959.”
https://en.wikipedia.org/wiki/Where_Is_Everybody%3F