The Cretaceous Period spawned walking death machines with a savage combination of speed, eyesight, brainpower, and razor-sharp implements. The latest science reveals the anatomical secrets of these bloodthirsty carnivores.

SUBMARINERS offers a "day in the life" of a submariner and profiles the amazing teamwork constantly performed, particularly in the nuclear sub, where safety is of vital importance. On a modern nuclear submarine, the distinction between night and day becomes a blur. Isolation, confinement, lack of privacy and intense pressure mark an endless cycle of six hour shifts. It is a world punctuated by constant attack readiness drills, tracking exercises and system checks. A world in which man no longer simply operates the weapon, he lives inside it, plotting the solutions and piloting the vessel on the most secretive of all military missions.

Generations: More than a million generations adapted dinosaurs to a changing planet. But each successful generation boils down to a single encounter between two like-minded reptiles. The latest science reveals the anatomical secrets to life and love among dinosaurs.

Join world-renowned chopper fabricator and Monster Garage host Jesse James for an in-depth look at the colorful history of these loud and proud machines. Jesse profiles the pioneers of the chopper movement, celebrates the unsung heroes whose ingenuity and creativity have inspired thousands of garage mechanics, and highlights some of the bike worlds seminal creations. Plus, watch as Jesse restores the "bird bike" – a 1969 cast-off that he discovered on the back of an old pickup truck. Jesse and the guys from West Coast Choppers put their heads together to figure out how to restore the bike to its original condition – everything from the frame to the gas tank to the motor.

Predators dont dominate the Cretaceous, plant eaters do. And their bodies are built to take a beating. The latest science reveals the anatomical secrets that made the worlds largest vegetarians such successful survivors in a world of claws and teeth.