 in which a group of heroes, including Yank & Doodle, Doctor Frost and the Green Lama, fought together against Frankenstein's monster.In issue #34 (Sept. 1943), the identity of the Black Owl was passed on from Doug Danville to Walt Walters, a character who was already established as the father of Yank & Doodle; the two series were merged.In issue #64 (June 1947), the father was sidelined by means of a bullet, and the focus was almost entirely on Yank & Doodle.