The Schemer is an enemy of Space Ghost in the original Hannah-Barbera series.
Two mysterious cruisers chase down Jan and Jase. They call for Space Ghost, who arrives and dispatches one cruiser following a tough battle. He captures the second with his Magno-Ray, and investigates. Inside, he discovers that The Schemer sent the cruiser, and concludes its purpose was to capture his friends! But he's wrong - it's purpose (as the Schemer himself reveals) was to capture all three of them! And it does, as metallic bands spring from the ceiling to snare the trio! Then The Schemer sends his trap cruiser hurtling towards the nearest supernova, where it and the trapped Space Ghost will burn up!