Two-Face first appears in "Detective Comics" #66 with the name Harvey "Apollo" Kent; later stories changed his name to "Harvey Dent" to avoid an association with Superman (Clark Kent). The character only made three appearances in the 1940s, and appeared twice in the 1950s (not counting the impostors mentioned below). By this time, he was dropped in favor of more "kid-friendly" villains, though he did appear in a 1968 issue ("World's Finest Comics" #173), in which Batman declared him to be the criminal that he most fears. In 1971, writer Dennis O'Neil brought Two-Face back, and it was then that he became one of Batman's most prominent arch-enemies.