A mystery novel-loving American tourist witnesses a murder in Rome, and soon finds herself and her suitor caught up in a series of killings.

On their wedding night, a newlywed couple find themselves menaced by a bloodthirsty vampire.

A writer of murder mysteries finds himself caught up in a string of murders in London.

Following his forced retirement from an appalling rock band, Jason decides to vacation at Brittlehouse Manor, a health farm run by the leather-gloved, ex-Nazi scientist Dr. Storm. Along the way, Jason meets Judy, also on her way to Brittlehouse Manor to visit her aunt, who married Dr. Storm some years ago. Once they arrive, the pair realise rather quickly that something is wrong, probably because the other guests have had their brains surgically removed, or all the blood pouring from the sink, or possibly just because the creepy midget keeps telling them to brush their teeth.

A group of drag-racing fanatics, members of a Los Angeles club, move into an old deserted mansion and set up shop, making it their headquarters. They hold a Halloween masked ball for the club's grand opening, and invite everyone to come dressed as their favorite monster! Oddly enough, the festivities turn sour when one of the bright youths discovers an impostor among them in the form of an honest-to-gosh live monster who's been hogging all the dances with the best-looking girls

Three teenagers encounter a ghost who is in limbo until he retrieves his lost head. They do their parts to help him find it.

Vampire Caleb Croft has awakened from his unholy slumber -- with an insatiable lust for blood and the pleasures of the flesh.

An American airbase in Canada provokes resentment from the nearby residents after fallout from nuclear experiments at the base are blamed for a recent spate of disappearances. A captain from the airbase is assigned to investigate, and begins to suspect that an elderly British scientist who lives near the base and conducts research in the field of mind over matter knows more than he is letting on..

A gang of young people call themselves the Living Dead. They terrorize the population from their small town. After an agreement with the devil, if they kill themselves firmly believing in it, they will survive and gain eternal life. Following their leader, they commit suicide one after the other, but things don't necessarily turn out as expected...

After a spate of murders, the villagers of Schtettel kill the depraved perpetrator, Count Mitterhouse. Fifteen years later the Circus of Nights appeared in the plague-ridden village and its performers include Mitterhouse's mistress, children and cousins. They have come to Schtettel to fulfil the Count's last words, an evil, vicious curse of death and destruction on those who participated in his impaling. The children of Schtettel become the targets for a brutal and devastating revenge as the Vampire Circus rehearses for its most deadly performance.

A spaceship is sent to Mars after an alien distress signal is picked up. They find one survivor, but when a crew member is found drained of blood it's evident they have rescued a bloodsucking monster. Uses footage from Encounter in Space (1963).

A circus becomes the location for stolen loot and murder.

A painter of morbid art, who becomes a murderous vampire by night and kills young women, attempts a daytime relationship with a woman who resembles a former love and is also the sister of one of his victims.

A mysterious, charismatic stranger attracts a cult-like following of aimless young hippies, only to reveal himself to be a vampire.

A journalist goes in search of his missing fiance.

Following a tragic accident that leaves him disfigured, crazed composer Erique Claudin transformed into a masked phantom who schemes to make beautiful young soprano Christine Dubois the star of the opera and wreak revenge on those who stole his music.

A child conceived by a mute servant girl transforms from an innocent youth to a killer beast at night with uncontrollable urges.

Dr. Thomas Bolton fights for the use of anesthetic in surgery and uses himself as a guinea pig, but soon finds himself addicted.