The Familiar of Zero (episode)

Summary
The students of the Magic Academy set a barrier to hold off the Ancient Dragon and its minions while waiting for reinforcements. Meanwhile, Saito returns to his house, but instead of going in he decides to find a way to return to Hakelginia, to help Louise, and has an idea upon looking on a newspaper. Despite the combined efforts of the students and forces of Tristain (armed with the FlaK 36), including Gallia, Romaila, and an Elven fleet led by Bidalsha, the dragons break into the academy. Louise escapes with Tiffania on Sylphid to protect the others, as the Ancient Dragon's target is only the two of them. Saito manages to hijack a F-2A Jet Fighter and flies through a solar eclipse returning to Hakelginia, then fire missiles on the Ancient Dragon, that saved Louise before she was about to be eaten by it. Derflinger appears before Saito; much to his surprise, Derflinger was actually alive inside Saito's Gandálfr rune. Saito fires all of the fighter's missiles onto the Ancient Dragon, but it only weakens its defenses. Louise contacts Saito through the World Door and he pulls her through it into the cockpit to have her cast the Explosion spell combined with Lífþrasir's power on the dragon, but she refuses out of fear for his safety. Saito tells her he will not die no matter what and reassures Louise with a kiss, finally convincing her. Closing on the dragon, Saito and Louise eject from the jet as it crashes into the dragon, further weakening it, and then Louise casts the enhanced Explosion spell, destroying the Ancient Dragon for good. Louise and a unconscious Saito land safely but Louise gets desperate if his life was extinguished by Lífþrasir's side effect. Then Saito awakens revealed in spite of Lífþrasir's power exhausted, Saito's other rune kept him alive. They are soon joined by all their friends, prompting Saito to propose to Louise, which she happily accepts. Sometime later at a church, Saito and Louise get married as everyone watches them tour away on their carriage. Back at De Ornielle, Louise uses the 'World Door' to create a way to Japan for Saito, where he shows her all the wonderful things of his world. The last scene shows Saito and Louise standing in front of his house to introduce Louise to his family.