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In 1978, CBS aired the abortive pilot of Escapade, aka Avengers USA. Written and produced by the British Avengers maestro Brian Clemens, it starred Granville Van Dusen and Morgan Fairchild as John Steed and Emma Peel's American secret agent counterparts. It was terrible.

It Was a Thing on TV: Episode 561--Escapade (https://www.itwasathingontv.com/e/episode-561-escapade/)

One of the more successful imports in the 60s and 70s was The Avengers (https://web.archive.org/web/20061031125335/http://www.jumptheshark.com/a/avengers.htm). An American version was bound to happen, and it did from the genius that was Quinn Martin. The leads were played by a name mentioned on this podcast a bit the last few weeks, Granville Van Dusen, and Morgan Fairchild. CBS took a pass, but the Avengers franchise (non-MCU version) lives on to this day.