"Just as Star Wars works better as fantasy as than as science fiction, so does The Black Hole work better as another genre entirely—in this case, gothic horror. The film is awash in mood and mystery. It’s steeped in shadows and silhouettes. Reinhardt isn’t just a mad scientist; he’s the deranged, manipulative Manfred in The Castle Of Otranto. And the Cygnus is that castle, only tilted on its side."
~The Black Hole sent a generation of sci-fi fans to hell · The A.V. Club