| Title | Withdrawal | Effects of Kryptonite | Confusion over Identity |
| The Kid From Krypton (Adv 242, Nov57) | Superboy plans to return to old Krypton in the Kid's place. Bids last farewell to friends and family. | Kid is super-sensitive to Kryptonite - fears first exposure will kill him. Superboy has built up partial immunity to it. | Kid and Superboy function as doubles. |
| Superboy's Last Day (Adv 251, Aug58) | Superboy very ill - takes to bed. Bids last farewell to friends and family. | Superboy's first encounter with Kryptonite - knows nothing about it yet - nearly dies from it. | Superboy mistaken for his first robot, and vice versa - do each other's tasks. |
| The Super-Sentry of Smallville (Adv 252, Sep58) | Superboy sits in the air, refuses to answer questions. | Plot triggered when piece of Red K falls from sky. Depicted in this early tale as concentrated Kryptonite, over 10 times stronger than Green Kryptonite. | Lana suspects wrongly that Superboy is really one of his robots. |
| The Super-Weakling From Space (Superboy 65, Jun58) | Very weak hero from space - cannot deal with conventional tasks. | Space visitor tries to find or make Green Kryptonite, thus scaring Superboy. | Space visitor and Superboy function as doubles. |
| The Man Who Destroyed Krypton (Superboy 67, Sep58) | Villain demands Superboy leave Smallville, accompany him to space. Bids last farewell to friends and family. | Exposure to Argon rays weaken villain, robbing him of super powers. | Superboy uses robot to impersonate him. |
| The Superman Hall of Trophies (J.O. 24, Oct57) | Superman sits perfectly still, pretends to be statue in museum. | Green Kryptonite paralyzes Superman, but does not affect his vision powers. | People think Superman is his statue. |
| The Boy From Mars (J.O. 27, Mar58) | Jimmy Olsen pretends to be a boy from Mars, temporarily abandoning his daily life. | Jimmy ingests Green Kryptonite, making him glow green, like The Manhunter From Mars. | Is it Jimmy, or the Martian he is pretending to be to sell newspapers? |
| The Outlaw Jimmy Olsen (J.O. 27, Mar58) | Jimmy Olsen stays home from work, while his double does his job. | Green Kryptonite plays a role in mystery plot. | Jimmy and his evil double both claim to be real Jimmy. |
| The Boy Who Hoaxed Superman (J.O. 31, Sep58) | Jimmy pretends to be frozen for hundreds of years - sneaks back to Daily Planet in disguise. | Jimmy puts a dummy of himself in cryogenic chamber. He disguises himself as someone else. |