Sunday is Monkey Covers day here at YACB. Because there's nothing better than a comic with a monkey on the cover.
An alien space ape steps out of the television on the cover to Creatures on the Loose #13, a revised (by Marie Severin) version of Jack Kirby & Dick Ayers' cover to Tales to Astonish #25.
(Standard disclaimer about alien space apes not really being monkeys applies.)
Image courtesy of the GCD. Click on the image for a larger version.