A 1938 local newspaper photograph shows Kovacs as a member of the Prospect Players, not yet wearing his trademark mustache. Like any aspiring actor, Kovacs used his class vacation time to pursue roles in summer stock companies. While working in Vermont in 1939, he became so seriously ill with pneumonia and pleurisy that his doctors didn't expect him to survive. During the next year and a half, his comedic talents developed as he entertained both doctors and patients with his antics during stays at several hospitals. While hospitalized, Kovacs developed a lifelong love of classical music by the gift of a radio, which he kept tuned to WQXR. By the time he was released his parents had separated, and Kovacs went back to Trenton, living with his mother in a two-room apartment over a store. He began work as a cigar salesman, which resulted in a lifelong tobacco-smoking habit.