These three episodes in the "Walking with Dinosaurs" series bring zoologist Nigel Marven face-to-face with recent research into supersized Mesozoic Era animals. Each episode approximately 29 minutes. On this disc: Land of Giants - visits the gigantic animals of South America, including argentinasaurus, in early Cretaceous Era. Filmmaker Jasper James. The Giant Claw - Marven studies velociraptors and therezinosaurus in the late Cretaceous. Filmmaker Tim Haines. Chased by Sea Monsters - three 29 minute episodes which go to different prehistoric eras; first, the Ordovician with its giant orthocones and the Devonian where he meets dunkelosteus, next basilosaurus of the Eocene Era and the megalodon of the Pliocene seas, and finally the massive Jurassic leedsichthys and the late Cretaceous mosasaurus. Filmmaker Jasper James. Letterboxed; DVD includes English subtitles, " Extreme Dinosaurs " a BBC Horizon program. (50 min.). BBC.