The Hideous Sun Demon (sometimes billed as The Sun Demon, or in the UK as Blood on His Lips) is a 1958 science fiction horror film written, directed, and produced by Robert Clarke, who also starred in the film. The film focuses on a scientist (portrayed by Clarke) who is exposed to a radioactive isotope and soon finds out that it comes with horrifying consequences.Synopsis
When research scientist Dr. Gilbert "Gil" McKenna falls unconscious after accidentally being exposed to radiation during an experiment with a new radioactive isotope, he is rushed to a nearby hospital. Attending physician Dr. Stern is surprised to find that Gil shows no signs of burns typical to a five-minute exposure to radiation and informs Gil's co-workers, lab assistant Ann Lansing and scientist Dr. Buckell, that he will keep the patient for several days of observation.
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