The Adventures of Little Archie #29

The return of Mad Doctor Doom and his assistant Chester, who were forced to flee Riverdale when Little Archie foiled their plan of world domination, and have been washing dishes on the ship \"The Pride of Walvis Bay.\" Mad Doctor Doom's new plan involves the help of the Grubbers, a group of creatures who live beneath the Earth's crust. But when Little Archie steps into the elevator at Bigbucks' department store, it takes him down to the Grubbers' lair, where he discovers Doom and the Grubbers' plot to knock out the entire city with a \"Vapour Vat\" full of sleeping gas.