Columbia subject headings:
Harvard subject headings:
Heroes on television.
Television programs--United States--History--20th century.
Television programs--United States--History--21st century.
Television series--United States--History and criticism.
Princeton subject headings:
Heroes on television.
Television programs--United States--History--20th century.
Television programs--United States--History--21st century.
Television series--United States--History and criticism.