A prehistoric monster called Gigantis emerges alongside another creature named Angurus.
Shoichi Tsukioka
Shoichi Tsukioka (voice)
Hidemi Yamaji
Hidemi Yamaji (voice)
Kôji Kobayashi
Koji Kobayashi / Narrator (voices)
Dr. Tadokoro
Yasuko Inouye, Koji's girl
Osaka Chief of Police
Chief of Civil Defense