After exposure to radiation, an atomic research scientist finds himself changing into a murderous, lizard-like creature every time he is exposed to sunlight.
The Hideous Sun Demon is a 1958 American science fiction horror film produced, directed, and cowritten by Robert Clarke, who also starred in the title role. It also stars Patricia Manning, Nan Peterson, Patrick Whyte, and Fred La Porta. The film focuses on a scientist who is exposed to a radioactive isotope and soon finds out that it comes with horrifying consequences.