When Dinosaurs Ruled The Earth

Dean and Sam are Paleontologists; Castiel is a writer. So none of them are quite sure why Gabriel, Castiel's brother, is inviting them out to get a sneak peek of his newest 'nature theme park'. But their fascination with the creatures that haven't walked the earth in 65 million years quickly turns to terror when a betrayal sends the whole island into turmoil, and when the fences come down, all bets are off.