War of the Colossal Beast (1958)
War of the Colossal Beast is a 1958 black-and-white science fiction film, directed by Bert I. Gordon , produced by Carmel Productions and distributed by American International Pictures. It continued the storyline of the 1957 movie The Amazing Colossal Man, although it was not marketed as a direct sequel, and featured a different cast. Both The Amazing Colossal Man and War of the Colossal Beast were later mocked on the television series Mystery Science Theater 3000.
More at Wikipedia.