Dr Decker (Michael Gough) goes missing in Africa for a year, when he finally returns to London he claims he will change the world with the new discoveries he has found. In his own lab he has rather suspicious looking plants which, when a serum is made from them, can greatly increase growth of animals. Naturally he starts injecting his pet chimp, who soon is a huge ape and who will do Dr Decker's bidding... i.e. kill.
Dr Decker is a fascinating character, dark and single minded. Killing means nothing to him, whether it is his cat which he shoots without a second thought or directing Konga to kill his rivals. His long suffering assistant Margaret (Margo Johns) has a bit more moral ambiguity. But only a bit more, she is happy to let Dr Decker continue on his way as long as he loves her. Unfortunately he has his eye on one of his buxom young students...
The film is remarkable cheese, with a man in an ape suit running rampant. The final act however oddly runs out of steam, as does Konga who just stands there while the army expend most of their Cold War stockpile to finally bring him down. Of course one major plot flaw is that when the chimpanzee is given growth serum it turns into a gorilla...
