Something strange is going on in the basement of PEP Comics! When portals from other dimensions begin to appear and open, what comes out is a who's who of classic characters! Join Sam Hill, Bentley of Scotland Yard, Gloomy Gus, and Super Duck and other classic characters from Archie Comics past as they arrive in Riverdale to see new things and have new adventures. But the problem is these characters don't want to leave Riverdale and if they stay it will be nothing but trouble! Collects 'Comic Cosmosis,' 'Meteor Madness,' and 'Interdimensional Insanity.'