Cage of Doom in the UK) is a 1958 independently made American black-and-white science fiction film, produced by Robert J. Gurney Jr, Samuel Z. Arkoff, James H. Nicholson and Gene Searchinger; directed by Robert J. Gurney Jr, and starring Ward Costello, Joyce Holden, John Stratton, Salome Jens and Fred Herrick.

The screenplay is based (uncredited) on the short story "Bottle Baby" by print/TV/film writer Henry Slesar that was published in the science fiction magazine Fantastic (April 1957).

Working in the privacy of his Florida island estate, nuclear physicist Professor Howard Erling and his assistant Victor construct a machine that transports a small statue from the future.

That night, Victor sneaks down to the lab and continues his experiment by increasing the power level, which results in a human form materializing.

The nurse arrives on the island and is murdered by the time traveller, who creates a replica of her face using a strange device and puts on her clothes.

After gaining entrance into the house, the traveller sits with Victor and hypnotizes him, revealing that her purpose is to bring him to the future, where his healthy genes will be used to breed a new race of radiation-immune humans.

In an attempt to break the hypnotic spell on Victor, Claire attacks the traveller and pulls the mask from her face, revealing her radiation-scarred features.

Critic Kevin Lyons wrote that the film's "few good ideas don’t go very far," that it features "a far from interesting love triangle and a mystery that never really resolves itself satisfactorily," that it is "weary and slightly browbeaten," but also that director "Gurney is capable of isolated moments of real atmosphere and suspense.

"[4] Critic Mark Hasan described the film as "the perfect synthesis of sci-fi clichés and fifties naivete, done with deadpan seriousness" and that "Gurney’s budget and his own screenwriting doom the project into a laughable Z-movie.