In the early 1980s, he was twice asked to produce a United States version of his most successful series - "The Avengers U.S.A." for producer Quinn Martin and "The Avengers International" for Taft Entertainment but neither version materialised. An earlier attempt by Clemens at a US-based "Avengers"-style series resulted in his writing and co-producing the hour-long pilot film "Escapade" which was aired by CBS in 1978; again, this project did not proceed to series. However, he did write episodes for the US TV series "Darkroom" (ABC-TV, 1981–1982), "Remington Steele" (NBC, 1982–1987), and "Max Monroe: Loose Cannon" (CBS, 1990).