Sick of costume dramas on Sunday nights? Then curl up on the sofa with some prehistoric drama – giant killers from millions of years ago, recreated with CGI and lots of roaring. In the sea, a 50-tonne Megalodon could have swallowed you sideways, with its two-metre-wide jaw. In the air, the Terror Raptor ruled South America, killing prey with one blow of its beak. But ugliest of all was the Entelodont, or Hell Pig, which rampaged across North America for 20 million years. Look, it’s Hell Pig or Lark Rise, you decide.