Giant Phantom Monster Agon (幻の大怪獣アゴン Maboroshi no Daikaijū Agon?) is a 1964 black-and-white Japanese Kaiju miniseries. Produced by Nippon Television, the miniseries aired on Fuji TV from January 2, 1968 to January 8, 1968. Internationally, the film is known as Agon: Atomic Dragon. The series was re-released in a condensed feature-length film in the mid-1990s by Toho.