MONSTER MASHUPS #99

 In HOUSE OF SECRETS #63 (1963), Mark Merlin and his secretary

-- who'd finally started fighting mystic menaces in #59, instead of the alien antagonists they'd been battling since the feature began in 1959-- took a break from the magical. In "The Nest of Fear," the adventurers encounter three allomorphic critters--one looking much like the Frankenstein Monster-- created ET evildoers in invade the Earth.