1st appearance of The Legion of Substitute Heroes (Polar Lad, Stone Boy, Night Girl, Fire Lad & Chlorophyll Kid).
Cover pencils by Curt Swan, inks by George Klein. The 5th Dimensional High-School! starring Superboy, script by Otto Binder, art by George Papp; Mxyzptlk plays pranks on Smallville in order to do well in his 5th dimensional practical joking class. The Legion of Substitute Heroes--Tales of the Legion of Super-Heroes, script by Edmond Hamilton, art by John Forte; A group of rejected applicants band together as the Legion of Substitute Heroes and thwart the Plant Men's scheme to take over the Earth; First appearances of Polar Lad, Night Girl, Stone Boy, and the Chlorophyll Kid. 36 pages, Full Color. Cover price $0.12.