Morgan Jeffery of Digital Spy calls the episode "thrilling" and "perhaps the highlight" of the series. However, he criticises the "lame, 'it was all a dream' ending", arguing that it is made more frustrating by the fact that the final episode, "The Inquisition", is a clip show that ends with the conflict between Earth and the Mysterons unresolved: "Cut the final few minutes from 'Attack on Cloudbase' and imagine what a finale that would have been!" Andrew Thomas of "Dreamwatch" magazine considers dream sequences an "appalling" narrative technique but describes the episode's scenes of destruction as "very well handled".