[1] It was written by Cort and Alistair McKenzie, based on a comic strip short story in the magazine Zeta,[2] and was produced by George Maynard and Tony Tenser for Tigon Films.

[5] In The Monthly Film Bulletin David McGillivray wrote: "The picture-stories for adults in the ill-fated magazine Zeta were an imaginative experiment, but this adaptation of one of them blunts its satire and magnifies its quite preposterous illogicality and silliness.

In fact, the treatment would render the film suitable only for Saturday morning audiences were it not for the glut of stark and near-naked girls that cavort incessantly through the hurriedly improvised settings.

Probability is a scarcity in the story: the touches of humour are obvious but amusing and some of the sequences are more than a little silly; but, generally speaking, it is fairly entertaining nonsense on a small scale.

"[7] In British Science Fiction Cinema Steve Chibnall called the film "a bizarre psychedelic concoction of sexploitation and feminist fable and a high-point of British cinema's flirtation with weirdness in the late 1960s," adding: "A critical and commercial failure on its release, Zeta One is easy to dismiss as a piece of crazed nonsense, but its significance lies in its eroticisation of collective feminist ambitions and its joyful welcome of a sexually rapacious matriarchy.