Nigel first goes fishing in the Ordovician. Even though fish hadn't evolve ye...
Sea Monsters: A Walking with Dinosaurs Trilogy
Season 1 Episode 3: To Hell and Back
Nigel follows a school of massive fish hoping to find history's the largest marine carnivore, Liopleurodon. Finally, in the cretaceous in a sea packed with predators Nigel searches for a the apex predator, Mausosaur.