Mexican luchador (wrestler) movies are a very odd genre. Imagine...they feature one or more masked wrestlers battling the likes of aliens, Atlantians, monsters (including Frankenstein, Dracula, mummies, the Wolfman, witches and zombies) and megalomaniacs bent on world domination. In some ways, the films are like James Bond or superhero films...but far, far cheesier when it comes to plot, make-up and the extensive use of cheap rubber masks.
In "Hellish Spiders" ("Arañas Infernales"), Blue Demon battles aliens from planet Arácnea, who have come to Earth to bring back brains for their queen to consume. Apparently, she ate up all the brains from her own planet and nearby planets and that's why they've chosen ours. Can Blue Demon stop them or is he destined to be brainless like everyone else on Earth?
The film might have been better titled "Plan 9 from Arácnea", as the special effects are that bad....yes, Ed Wood Jr. bad. The UFOs look like pie plates and jiggle just like them. And, like "Plan 9" they also can shoot out beams to turn folks into skeletons! And, like "Plan 9" the writing and acting and direction are pretty bad...and also unintentionally funny. I checked and was not surprised to see that some of the film WAS lifted from "Plan 9" as well as another crap-tastic American film from the same era, "Teenagers From Outer Space". You know a film is bad when it steals from this caliber of movie!!
Overall, this is a terrible film. But like "Plan 9" there is a certain campy silliness that make it fun viewing. Terrible in just about every way...yet funny because it's so incredibly bad!