Heinrich Zemo

A ruthless Nazi scientist and nobleman, Heinrich Zemo served the Third Reich during World War II, developing deadly experimental weapons and chemicals — including Compound X, which dramatically slowed his aging. His hatred of Captain America made him a persistent threat well into the modern era.

Few villains carry the weight of history quite like Heinrich Zemo, a Silver Age titan who first stalked the pages of The Avengers #4 in 1964, conjured by the legendary pairing of Stan Lee and Jack Kirby at the height of Marvel's creative explosion. Across 114 catalog appearances — twelve of them collector-recognized key issues — he has haunted Captain America and The Avengers for six decades, a testament to just how deeply this masked menace burrowed into Marvel's mythology. He shares those storied pages with the mightiest names in the business: Iron Man, Thor, the Wasp, and Hank Pym, which tells you everything about the company his schemes demand. If you're building any serious understanding of Marvel's Silver Age foundations, Heinrich Zemo is absolutely essential reading.