Superboy #142

Few Silver Age covers command attention quite like this one: a massive, snarling gorilla in Superboy's full costume — blue suit, red cape, yellow belt and all — dominates the scene, one enormous fist thrust toward the reader while a terrified young Clark Kent is clutched helplessly in the other hand. The speech balloon makes the premise gloriously clear, promising that this transformed Super-Ape intends to settle a score with Clark Kent himself. Curt Swan's pencils and George Klein's inks deliver every dramatic detail with polished 1967 DC craftsmanship, making "Superboy Goes Ape!" one of those covers that's simply impossible to walk past without picking up.