Critics score:
Reviews provided by RottenTomatoes
Roger Greenspun, New York Times: Nothing very exciting goes on. Read more
Dave Kehr, Chicago Reader: Robert Wise brings his Academy Award-winning sobriety and meticulousness to a pulp tale that cries out for the slapdash vigor of a Roger Corman. Read more
Roger Ebert, Chicago Sun-Times: Splendid entertainment that will get you worried about whether they'll be able to contain that strange blob of alien green crystal. Read more