Let’s begin by acknowledging the real invasion here: The Incredible Invasion isn’t so much a movie as it is a slow, staggering collapse of dignity wrapped in tinfoil and vaguely accented English. Marketed as science fiction but better classified as cinematic taxidermy, this 1971 Mexican production stars the legendary Boris Karloff—or rather, the last, labored breaths of his career—filmed two years before his death and released posthumously, which somehow still feels too soon.
Plot: Ray Gun? More Like “Ray None”
Set in the futuristic world of 1890 Gudenberg, which looks suspiciously like a single room dressed with half a chemistry set and some curtains borrowed from your grandmother’s house, we meet Professor John Mayer. Not that John Mayer—the other one, the elderly scientist played by a visibly exhausted Boris Karloff. Professor Mayer invents a nuclear-powered ray gun, because that’s just what the 1890s were known for: artisanal nuclear weaponry. During testing, he accidentally fires a beam into space, which is less “sci-fi intrigue” and more “intergalactic butt dial.”
Naturally, this draws the attention of a flying saucer, who apparently have the interstellar equivalent of “Find My Ray Gun” enabled. Rather than communicate or send a warning email, the aliens opt for the much more reasonable response: invade Earth and destroy everything. Why? Because logic packed up and left before the opening credits.
Karloff’s Final Performance: Sit Down, Stay Awhile… Forever
Boris Karloff, who built his legacy as Frankenstein’s monster and other iconic horror characters, spends the entire film either seated, leaning, or possibly being propped up Weekend-at-Bernie’s style. Director Jack Hill (who shot Karloff’s scenes separately in Los Angeles) wisely chose to have Karloff sit through every line delivery like a man waiting for his lunch at the retirement home—not performing so much as narrating from beyond.
He plays Professor Mayer like a guy who’s 75% ash and 25% confusion. You can almost hear his joints creak louder than the dialogue. If Karloff’s delivery sounds like he’s phoning it in, it’s probably because someone held a rotary dialer up to his oxygen tank.
The Rest of the Cast: Terror by Tedium
After Karloff checks out (mentally if not physically), we’re left with Enrique Guzmán as Dr. Paul Rosten, who fights aliens with the charisma of a wet dishcloth. Christa Linder and Maura Monti appear as competent scientists and/or vaguely defined eye candy depending on the scene—and wardrobe budget. Yerye Beirute plays a man so intensely untrustworthy he makes the aliens look like Jehovah’s Witnesses dropping off cookies.
And then there’s Sergio Kleiner as The Alien, whose performance oscillates between stiff and taxidermied, all while wrapped in a costume that looks like it was made out of leftover car upholstery and resentment.
Special Effects: Bargain Bin Apocalypse
The spaceship looks like it was built out of pie tins, dreams, and budgetary despair. The ray gun resembles a mutated leaf blower, and the “alien invasion” mostly consists of people waving flashlights and running in slow motion through empty lots.
Explosions are simulated by shaking the camera and tossing off-brand glitter, and there are more Dutch angles here than in a 1960s Batman episode. You half expect Adam West to walk in and apologize for the mess.
Direction & Editing: Conducted by Confusion
Luis Enrique Vergara’s direction (completed in Mexico after Karloff’s LA footage was spliced in) gives new meaning to “tonal dissonance.” The editing stitches Karloff into scenes with the subtlety of Frankenstein’s monster sewn together with a stapler and chewing gum. One moment we’re with the professor and his armchair, the next we’re watching someone in another country get vaporized by glowing stock footage.
The two films—Karloff’s somber monologues and the Mexican invasion sequence—are edited together with all the grace of a bar fight choreographed by two cats in a dryer.
Final Verdict: ★☆☆☆☆ (One Star for Karloff’s Bones)
The Incredible Invasion is less a sci-fi thriller and more a poorly-attended wake. It’s a film stitched together from expired film reels, elderly dread, and the slow collapse of a horror legend’s career. The aliens don’t need to destroy Earth—watching this movie accomplishes the same emotional damage.
Watch this if you’re a Karloff completionist, a fan of nuclear-powered antique weaponry, or currently trapped under something heavy. Otherwise, heed the film’s unintentional moral: just because you can resurrect something doesn’t mean you should.
