Jean constructs another invention -- a miniature glider powered by a rocket for take off from the Nautilus's deck. Unfortunately, during the test flight, the engine backfires and the glider spirals out of control, finally exploding in the sky. The crew panics, fearing that Gargoyle will probably discover them because of this incident. Sure enough, they are proven right, because Nemo and the others are forced to take down more Garfish submarines. Afterwards, Nemo warns Jean to be more careful with his inventions. Nadia is infuriated to see Jean take Nemo's reprimand without the slightest impulse to stand up for himself, but she goes too far in trying to stand up for him and is slapped by Nemo, especially when she insults him and his crew. Furthermore, Nadia's burgeoning jealousy over Jean's friendship with Electra intensifies… until she finally learns from the latter that she is in no danger of losing Jean. Electra only considers Jean like a little brother she once lost years ago to an attack by an evil man. Nadia recognizes the murderer as Gargoyle, and begins to realize the error of her misjudgment.