Reviews provided by RottenTomatoes
It opens at fever pitch and then starts soaring -- into genetic fantasy, into a precognitive dream of delirium and delight.
New York Times:
Dependably -- even exhilaratingly -- bizarre. Its strangeness, which borders cheerfully on the ridiculous, is its most enjoyable feature.
There isn't a lucid moment in it (and much of the dialogue is rendered unintelligible by Russell's subversive direction), but it has dash, style, and good looks, as well as the funniest curtain line since Some Like It Hot.
[Director] Russell's noisily grandiose swipe at psychedelia embellishes what is no more than the cosily familiar story of the obsessive Scientist Who Goes Too Far and Unwittingly Unleashes, etc.
Direction by Ken Russell has energy to spare, with appropriate match-up of his baroque visual style to special effects intensive material.