Superman meets three Kryptonian brothers who were convicted and sentenced by Krypton's Ruling Council to a sentence of suspended animation adrift in space due to their efforts to overthrow the Council and rule Krypton. Now that they have crashed on Earth, they plan to rule it instead. Superman tricks them into turning on each other, and they knock themselves out. Superman returns them to suspended animation and exiles them back into space.; As a reward for saving Lois's life, Superman lets Dr. Potts perform a complete set of scientific tests on his powers. But Dr. Smiggs tries to horn in the act with criminal intent.; Lois gets jealous when Superman seems to be paying more attention to Peggy, her roommate.