Finally, Halk Kar recovers his memory, and explains that he is from the planet Thoron, which is in the same star system as Krypton. Years ago, while on a pioneer voyage into space, he landed on Krypton with his damaged rocketship. There he met Jor-El, who explained that Krypton's destruction was imminent and repaired Halk Kar's rocketship, sending him away with the note which had a map from Krypton to Earth on it. Krypton exploded shortly afterward, causing Halk Kar to be put into suspended animation until he drifted to Earth to meet Superman, the grown-up son of Jor-El referred to in the note. Halk Kar returns to Thoron in his repaired rocketship, leaving Superman with the experience of briefly having had a brother.