Episodes:
- 01. Mysterious flying-saucer invasion! Sky knight takes off!
- 02. Appearance of the fortress island! Metropolitan X’s critical moment!
- 03. The invasion’s evil influence! The G-Reactor won’t operate!
- 04. The aliens’ trap! Invincible responds!
- 05. Extreme offense and defense! Solve the element riddle!
- 06. Super-weapon sortie! Battle at Earth’s final hour!