Konga

Dr. Charles Decker (Michael Gough) walks back into London a year after he was given up for dead, carrying a baby chimpanzee he calls Konga and a method for growing plants and animals to enormous size. He has enemies at home, and he intends to use the animal to get rid of them. John Lemont shoots it in Eastmancolor, with Decker, the chimp and his secretary Margaret (Margo Johns) closed inside his house.