Rodak’s men look at a memory machine showing all the creatures that the mighty Goldar has beaten. Rodak decides that he must now bring to Earth the strongest monster of them all, Kono (Goa Gongon), for the final attempt at defeating Goldar. Mathusam has been gone for three days and the Space family is worried. Rodak causes an eclipse, plunging the Earth into darkness. Rodak sends a parrot to spy on the Mura family. The bird flies in Mikko’s open window and his parents Tom and Tomoko decide he can keep it. Mathusam returns and tells everyone that he must return to space so the time has come for Goldar to defeat Rodak once and for all! Rodak overhears everything via the eyes and ears of his parrot-spy. Rodak plans to have all of the Earth’s volcanoes erupt at the same time. The space villain informs the people of Earth that a new creature will soon be coming and that they watch the tallest tower the next day at 8:00 AM. Rodak appears in person and then transforms into Kono, the mightiest monster in history! The call goes out for the Space Avenger— possibly for the last time!