Hiro her theory of "warm fusion," which potentially holds the key to returning Notzilla to his normal size. Notzilla menaces a train by peeling the "passengers" off its backlit windows, while Hiro joins forces with local brewmeister Fritz Übertrinker, using Shirley's warm fusion to develop an "anti-beer" formula. Despite the danger to Cincinnati, Richard rallies his colleagues to help him build his Mega-Blaster. Bogus faces Notzilla again, but fails. As the two teams of scientists continue their work, Bogus sets another ineffective trap for the monster with high-tension wires; with a blimp tucked under his arm, the monster runs a "touchdown" under the wires. Notzilla then makes his way through the streets of Cincinnati, emitting fiery burps. He picks up Shirley, but she manages to communicate with him, directing him to put out the fires he's set (unfortunately, he does so with a spray of urine). Then setting her down, he leaves the city. Shirley returns to SNUGI and reveals Richard's secret: he's not a real scientist, but former child movie star Donnie Draper. This delights Dr. Butay, but horrifies the other physicists. Shirley encourages them to sabotage the Mega-Blaster. Richard/Donnie unveils the weapon at Big Finale Ridge and Dr. Butay aims it toward the city, but it shorts-out (sabotaged by the other scientists). Notzilla arrives and presents Shirley with a bouquet of trees. Hiro shows up in a flatbed truck, with the anti-beer formula stored inside an enormous beer can. Drinking it, Notzilla is reduced to his natural size, to the delight of nearly all. Dr. Butay, however, unveils a super-secret alternative power switch. As Richard/Donnie reaches to push the button, the rest of the cast leaps in front of the monster, declaring (a la Spartacus) that they too are Notzilla. Hiro rams the beer can with the truck, knocking it into the death-ray's path, causing it to spray the formula onto Butay and Richard/Donnie. As a result, both shrink to the size of dolls. 4-Star General Specific arrives, tipped off by ace reporter Pearl Stringer. Gen. Specific appoints Shirley as the new head of SNUGI, and Hiro as director of the Pentagon's nascent Giant Monster Protection Program, tasked with protecting the world from "sequels!" In the aftermath, Shirley and Hiro adopt Notzilla, who carries around Dr. Butay and Donnie in a toy car. Hiro asks Shirley about adopting more kids, just as three new Notzilla eggs float ashore.