At the EFA's underwater energy base, something is attacking it. They ask Gravion to investigate. Leele goes there, and they lose contact with her. The others investigate. Eiji takes Una's place. The Zerivire attacks at this point. Toga finds Leele and rescues her, only to be confronted by some mini-Zerivire. Toga forces Leele into another room while he battles the Zerivire alone. Meanwhile, just as things were looking hopless outside, the rest of the Gravion arrives. Eiji finds Toga lying on the ground, with his head in Leele's lap.
After the rescue, Gravion is formed and then attacks the Zerivire. Toga has lost his sight due to lack of oxygen. However, Leele goes to him and guides his hands.
Later on, Toga recovers at the base.
EFA海底基地を襲ったゼラバイアの偵察中、リィルが消息を絶ってしまう。捜索に出る斗牙、琉菜とエイジ。エイジの指示でリィル救出を優先したグランカイザーはGシャドゥ共々、ゼラバイアと化した海底基地内へ。斗牙とリィルは脱出できるのか？
Als bei einem submarinen Erdwärmekraftwerk der EFA etwas nicht mit rechten Dingen zuzugehen scheint, bittet die EFA schließlich Earthgartz um Hilfe. Leele geht mit dem G-Shadow auf Tauchfahrt, doch plötzlich bricht der Kontakt zu ihr ab!
