A lonely child creates an imaginary playmate with surprisingly dangerous results.

Determined to develop a gaseous drug that allows patients to tolerate the difficulties of surgery, Dr. Bolton (Boris Karloff) devises numerous opium-based remedies, which he tests on himself. His experiments fail miserably in trials performed for his colleagues -- who include his own son, Jonathan (Francis Matthews) -- and Bolton is dismissed from his position. Having developed an addiction to opium, Bolton finds work treating the poor but falls in with grave robbers in order to get drugs.

When a white racist wakes up a head transplant, he learns that his head has been transplanted onto the body of a black convict.

Dr Jeffery Stewart and Dr Dan Forbes, two scientists, from the Office of Scientific Investigation must stop a creature that threatens to destroy Earth.

An Austrian general agrees to care for Marcilla, a countess's daughter, while her mother is away. However, Marcilla turns out to be a seductive and dangerous vampire.

A desperate young heiress is convinced that she's a werewolf responsible for a grizzly series of unsolved murders that have terrified the citizens of London and baffled Scotland Yard.

Voodoo brings back a hit-and-run victim (Jon-Miki Thor), with a baseball bat, for revenge on rapists and a police chief (Adam West).

Paul Carver, a tourist, stumbles upon a castle at night where he is treated like royalty by the wealthy woman who lives there. However, come morning, the castle and woman vanish, leaving him befuddled

Dr John Holden, an American professor, arrives in the UK to attend a conference. However, his visit soon turns into a mission to expose a satanic cult headed by Dr Julian Karswell.

Four men are found brutally murdered with each victim found lying next to a doll. Inspector Holloway sets out to investigate the case. Meanwhile, shocking truths are revealed.

The true value of an estate brings out the worst in the deceased's doctor (Christopher Lee), lawyer, sister (Joan Collins) and rightful heir (Robert Hardy).

A newlywed fears that an ancient curse will turn her into a bloodthirsty beast.

In 15th century France, Esmeralada, a gypsy girl is framed for murder by an infatuated Chief Justice, Frollo. Quasmito, a hunchback learns the truth and is determined to save her.

Driving through a brutal thunderstorm in Wales, three travelers take refuge in an eerie house owned by the Femm family. Reluctantly admitted by Horace Femm (Ernest Thesiger), the three sit down to a strange dinner. Horace is neurotic; mute butler Morgan (Boris Karloff) is an alcoholic; and Horace's sister, Rebecca (Eva Moore), raves about chastity. When the storm brings in an industrialist and chorus girl Gladys DuCane Perkins (Lilian Bond), Morgan's lust and Rebecca's ire are ignited.

A man (Lionel Atwill) uses mind over matter to replace his legs, then hunts the doctors who took them.

An earthquake doesn't just shake up Southern California -- it awakens a nest of monsters lurking in the Salton Sea. These bloodthirsty sea snails are gobbling up anyone who sets foot in the water. And when the creatures move on to land in search of wider hunting grounds, they launch a reign of terror that threatens to spread across the whole country. Humanity's only hope rests on a crew of intrepid scientists and Lt. Cmdr. John Twillinger (Tim Holt).

Anatasia offers Lois Cavendish her old mansion for business. However, she lays down a condition that the place is haunted and they have to free it from ghosts.

A scientist (Robert Hutton) and a tycoon (George Coulouris) revive the talking head of medieval seer Nostradamus.