Time-travelling zoologist Nigel Marven continues his CGI enhanced journey through the prehistoric marine world. A visit to the Pliocene era provides an encounter with a giant shark called a Megalodon. Show more

First programme with this trilogy about dinosaurs, zoologist Nigel Marven time travels to visit deadly creatures of the prehistoric oceans including sea scorpions, giant squid and placoderms. Show more

Nigel Marven visits the Jurassic period where the scary Liopleurodon holds sway, and then on to the Cretaceous to see "Hell's Aquarium". Show more