Ultraseven: S1 E44 - The Terrifying Supe Ape-Man
Midnight, a police patrol officer was beaten to death by an ape-like big man. Dan and Anne visited the Monkey Center for investigation and was welcomed by Professor Mayama, Anne's old friend. However, Mayama and his woman assistant were both brainwashed by Alien Goron. The aim of Alien Goron was to exchange humans' brains with that of apes', making Earth a planet of ape-mans!