Today on Public Domain Theater, we have the 1964 effort Monstrosity.
Also known by it's alternate (and substantially more interesting) title The Atomic Brain, this extremely low budget film was shot in 10 days. The alternate title was a clear attempt to make this relatively mild little film sound more like a creature on the loose extravaganza. Needless to say it is not. If you could not tell from it's 64 minute running time, this is what we used to call the "B" picture of a double feature.