Space aliens arrive on Earth with their giant shark and intend to take over the planet but they must first destroy Gamera.

This Showa era finale sees our victory-drunk turtle triumphantly hammering out his theme tune on the back of a vanquished foe, viciously playing him like a defective xylophone. An alien shark is the villain this time out, while an unusually moody Gamera appears to be off his meds. A hoot and a half.