Heck remained at Harvey, where one co-worker in the production department was future comics artist Pete Morisi, for two-and-a-half years. When a Harvey employee, Allen Hardy, broke off “to start his own line, Media Comics actually Comic Media, in 1952," Heck recalled in 1993, Hardy “called me up and asked me to join." Heck's first known comics work appeared in two Comic Media titles both cover-dated September 1952: the war comic "War Fury" #1, for which he penciled and inked the cover and the eight-page story "The Unconquered", by an unknown writer; and the cover and the six-page story "Hitler's Head", also by an unknown writer, in the horror comic "Weird Terror" #1. Heck's work continued to appear in those titles and in the horror anthology "Horrific", for which he designed the logo; the adventure-drama anthology "Danger"; the Western anthology "Death Valley"; and other titles through the company's demise in late 1954.