- Many episodes had censorship cuts for the Italian edition, for example Foster drunken in Ordeal (1970) or Straker's relationship with Jo Fraser in The Responsibility Seat (1971) and Freeman's many flirts and jokes about women.
- Many episodes were cut, re-dubbed and/or re-edited and compiled in the compilation movies Invasion: UFO (1974), UFO: Distruggete Base Luna (1971), UFO: Prendeteli vivi. (1974) and UFO... annientare S.H.A.D.O. stop. Uccidete Straker... (1974).
- For the German dubbed version many episodes were altered to remove references to death (i.e. the death of Straker's son; the funeral of Bill; Straker seeing a dead alien). Additionaly, all captions showing the year the events take place (1980) were deleted.
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