Issue: #306
Last valuation update: 2026-10-22
Story 1: The 5th Dimensional High-School!A young Mr. Mxyzptlk arrives in Smallville to cause trouble for Superboy.Story 2: The Legion of Substitute Heroes!Five heroes, rejected from the Legion of Super-Heroes for various reasons, decide to come together and form their own team: the Legion of Substitute Heroes!
First appearances: Polar Boy, Stone Boy, Night Girl, Chlorophyll Kid, Fire Lad
Creators: George Papp, George Klein, Curt Swan, Joe Letterese, John Forte, Otto Binder, Mort Weisinger, Edmond Hamilton
Characters: Superman, Mr. Mxyzptlk, Bouncing Boy, Brainiac 5, Chameleon Boy, Colossal Boy, Cosmic Boy, Krypto, Sun Boy, Saturn Girl, Polar Boy, Stone Boy, Night Girl, Shrinking Violet, Chief Parker, Chlorophyll Kid, Jonathan Kent, Martha Kent, Lana Lang, Pete Ross