At the Opera of Paris, a mysterious phantom threatens a famous lyric singer, Carlotta, and forces her to give up her role (Marguerite in Faust) for unknown Christine Daae. Christine meets this phantom (a masked man) in the catacombs, where he lives. What's his goal? What's his secret?

The ancient vampire Count Dracula arrives in England and begins to prey upon the virtuous young Mina.

An obsessed scientist assembles a living being from parts of exhumed corpses.

A resurrected Egyptian mummy searches Cairo for the girl he believes to be his long-lost princess.

A scientist finds a way of becoming invisible, but in doing so, he becomes murderously insane.

Mary Shelley reveals the main characters of her novel survived: Dr. Frankenstein, goaded by an even madder scientist, builds his monster a mate.

After botanist Wilfred Glendon travels to Tibet in search of a rare flower, he returns to a London haunted by murders that can only be the work of bloodthirsty werewolves.

Hungarian countess Marya Zaleska seeks the aid of a noted psychiatrist, hoping to free herself of a mysterious evil influence.

Returning to the ancestral castle long after the death of the monster, the son of Dr. Frankenstein meets a mad shepherd who is hiding the comatose creature. To clear the family name, he revives the creature and tries to rehabilitate him.

The owner of a coal mining operation, falsely imprisoned for fratricide, takes a drug to make him invisible, despite its side effect: gradual madness.

An ancient mummy is revived to destroy the invaders of the 3,000 year-old tomb of an Egyptian princess.

An attractive model with an ulterior motive volunteers as guinea pig for an invisibility machine.

A practical man returns to his homeland, is attacked by a creature of folklore, and infected with a horrific disease his disciplined mind tells him can not possibly exist.

When Ygor brings the Monster to Dr. Ludwig Frankenstein for care, Ludwig gets the idea of replacing the Monster's current criminal brain with a normal one.

The Invisible Man's grandson uses his secret formula to spy on Nazi Germany.

A high priest travels to America with a living mummy to kill those who had desecrated the tomb of an Egyptian princess thirty years earlier.

After being awakened, Larry Talbot chips Frankenstein's Monster out of a block of ice. When Talbot changes to the Wolf Man, the two creatures battle each other.

A disfigured violinist haunts the Paris Opera House.

Count Alucard finds his way from Budapest to the swamps of the Deep South after meeting Katherine Caldwell, of the moneyed Caldwell clan that runs a plantation called Dark Oaks. She's obsessed with occult matters. Who better to guide her through this supernatural world than Count Alucard, whose name no one bothers to spell backwards? No one, that is, except the wily Dr. Brewster, an old family friend. He'll join Professor Lazlo, a specialist in the occult, in fighting this "Alucard" and the woman he's influenced. Or has Katherine influenced him? Meanwhile, Katherine's fiancé, Frank Stanley, will find his courage and his sanity sorely tested when he accidentally shoots Katherine to death, yet finds that she goes on living.

An eccentric scientist helps a fugitive from the law become invisible, unwittingly giving him the power to exact revenge on his former friends.

An Egyptian high priest travels to America to reclaim the bodies of ancient Egyptian princess Ananka and her living guardian mummy Kharis. Learning that Ananka's spirit has been reincarnated into another body, he kidnaps a young woman of Egyptian descent with a mysterious resemblance to the princess. However, the high priest's greedy desires cause him to lose control of the mummy.

An evil scientist and his hunchbacked assistant escape from prison and encounter Dracula, the Wolf Man and Frankenstein's Monster.

An irrigation project in the rural bayous of Louisiana unearths living mummy Kharis, who was buried in quicksand twenty-five years earlier.

Count Dracula and the Wolf Man seek cures for their afflictions; a hunchbacked woman, a mad scientist and Frankenstein's Monster have their own troubles.

Two hapless freight handlers find themselves encountering Dracula, the Frankenstein Monster and the Wolf Man.

Two employees of a secluded hotel investigate a murder on the premises in which the goofy bellboy is the prime suspect.

Two bumbling private eyes help a man wrongly accused of murder who has become invisible to help clear his name.

Two bumbling American cops hunt for the mysterious Mr. Hyde in London, England.

A strange prehistoric beast lurks in the depths of the Amazonian jungle. A group of scientists try to capture the animal and bring it back to civilization for study.

Men capture the Creature from the Black Lagoon and make him an aquarium attraction, from which he escapes.

In Egypt Peter and Freddie find the archaeologist Dr. Zoomer murdered before they can return to America. A medallion leads them to a crypt where a revived mummy provides the terror.

A scientist captures the Creature and turns him into an air-breather, only for him to escape and start killing.