The Ultraman: S1 E50 - To The Planet Of Ultra, Part 4: Victory For Peace The Ultraman

The Great Sage had been reduced to atoms by Heller, but in space, Joneus separated from Hikari can be seen fighting the Heller fleet. The Science Guard Party members come together and begin fighting against the Heller Army again. Hikari is caught in an explosion when the control room in the defense tower is destroyed and he falls, but Joneus flies to him and they merge once again!