The venerable rocket pack, helmet, and trusty "up/down" chest controls that appeared in several unrelated Republic serials made their debut here. Young scientist Jeff King dons the flying gear and takes off after the sinister Dr. Vulcan, who plans to hold the city of New York hostage with his destructive Decimator device. Tristram Coffin, Mae Clarke star. 12 episodes; 166 min. on two discs. Standard; Soundtrack: English.