I saw the last episode of season 4 and it was crap .....SPOILER - first Louise send Saito back to his world so she can protect him from killing himself and he try to find a way back to save her so he stole a fighter jet ( btw you cant get in the air base that easy and steal a plane) and he flies into the solar eclipse and turn out the talking sword the suppose got destroyed was alive inside the plane.......and they finally get married and visit his world and his family house (i think ) i perfer Tabitha