Following years of relative peace, mankind is once again under attack by giant monsters. A new Ultra Hero, Ultraman Jack, arrives from Nebula M78 to combat this threat. After merging his life with that of Hideki Go, a young race car driver killed while rescuing a boy and a puppy from a rampaging monster, Ultraman Jack battles alongside the terrestrial defense team known as MAT (Monster Attack Team) to protect the Earth. RETURN OF ULTRAMAN is the fourth entry in the Ultraman Series, premiering in Japan in April 1971. The series introduces dozens of new aliens and monsters, and it also features guest appearances from the original Ultraman and Ultraseven, presenting the first of many Ultra Hero team-ups. All 51 episodes of RETURN OF ULTRAMAN are now presented in stunning High-Definition!