The Mad Monster (1942)

The mad scientist Dr. Cameron has succeeded in his experiments with a serum that will turn a man into a wolf-like monster, and is ready to avenge himself on the men who caused his professional failure. He uses it on his gardener Petro and one after the other is killed by his creation. His daughter, Lenora, grows suspicious and confides with newspaper reporter Tom Gregory. Starring Johnny Downs, George Zucco, and Anne Nagel. Is it a man-made bigfoot? A great retro-horror movie from the 40s!