Dinosaurs Season 4 Episode 1 Monster Under the Bed Episode Title:Monster Under the Bed.Episode Description:Baby complains of a monster under his bed, but the family does not believe him. One night while Fran and Earl are out, Charlene humors Baby by investigating his claim and is dragged into the monster's hole. Robbie and Baby try to rescue Charlene, but they, too, are kidnapped. Just as they are about to be eaten, Robbie learns that the monster named Decker is angry at having his home (hole) built upon by the Sinclair's house. The whole crisis is resolved after Baby suggests moving the house and the Sinclairs oblige.