By 1964, sales on Batman titles had fallen drastically. Bob Kane noted that, as a result, DC was "planning to kill Batman off altogether".[43] In response to this, editor Julius Schwartz was assigned to the Batman titles. He presided over drastic changes, beginning with 1964's Detective Comics #327 (May 1964), which was cover-billed as the "New Look". Schwartz introduced changes designed to make Batman more contemporary, and to return him to more detective-oriented stories. He brought in artist Carmine Infantino to help overhaul the character. The Batmobile was redesigned, and Batman's costume was modified to incorporate a yellow ellipse behind the bat-insignia. The space aliens, time travel, and characters of the 1950s such as Batwoman, Ace, and Bat-Mite were retired. Batman's butler Alfred was killed off (though his death was quickly reversed) while a new female relative for the Wayne family, Aunt Harriet, came to live with Bruce Wayne and Dick Grayson.[44]

The debut of the Batman television series in 1966 had a profound influence on the character. The success of the series increased sales throughout the comic book industry, and Batman reached a circulation of close to 900,000 copies.[45] Elements such as the character of Batgirl and the show's campy nature were introduced into the comics; the series also initiated the return of Alfred. Although both the comics and TV show were successful for a time, the camp approach eventually wore thin and the show was canceled in 1968. In the aftermath, the Batman comics themselves lost popularity once again. As Julius Schwartz noted, "When the television show was a success, I was asked to be campy, and of course when the show faded, so did the comic books."[46]