NAT GEO

S02 E05 — Rome's Desert Cities Archaeologists excavate a buried city in Jordan, dive a sunken temple in Italy and explore Petra to shed new light on how Rome conquered the east.

S02 E06 — Battles on Rome's Frontier Archaeologists excavate the vast frontier of the Roman Empire, investigating the battle to keep it safe.

S02 E04 — Lost Ships of Rome Discoveries uncover how the Romans ruled the seas for four centuries.

S02 E05 — Rome's Desert Cities Archaeologists excavate a buried city in Jordan, dive a sunken temple in Italy and explore Petra to shed new light on how Rome conquered the east.

S02 E06 — Battles on Rome's Frontier Archaeologists excavate the vast frontier of the Roman Empire, investigating the battle to keep it safe.

S01 E01 — Secrets of the Deadly T-Rex A look into how the T. rex became king of the dinosaurs.

Secrets of the Terror Whale A look into how prehistoric land mammals evolved into top ocean predators.

S01 E07 — Secrets of the Giant Mammoths How the giant ice age mammoth became extinct.

S01 E03 — Secrets of the Saber-Tooth Tiger Taking a look at the excavations in the La Brea Tar Pits in Los Angeles and showcasing how the pits can help unravel the mystery of how the saber-toothed tiger hunted its prey.

S08 E08 — Highway to Hell Lisa and Todd take on one of the toughest runs of the season; Darrell steals business from his former boss; Alex's trucking season is threatened by a crash.

S08 E09 — Flirtin' with Disaster Darrell's calls in a surprising reinforcement; but can this new team member hack the treacherous ice roads; Hugh has a brush with near disaster.

S01 E05 — Ghost Gun A sloshed snowboarder causes trouble at the airport; a pair of packages add up to a deadly surprise.

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S08 E09 — Flirtin' with Disaster Darrell's calls in a surprising reinforcement; but can this new team member hack the treacherous ice roads; Hugh has a brush with near disaster.

S08 E03 — The Miracle Dog Dr. Oakley tends to an ill reindeer and performs surgery on a canine burn victim.

S08 E08 — Porcupine Posse In the field, Dr. Oakley discovers a problem that's infesting reindeer and gets an unpleasant surprise from a famous porcupine.

S08 E05 — Squawk Off! Dr. Oakley explores what ails a sick German shepherd and treats a prickly peacock.

S08 E07 — At the Cow Wash Dr. Oakley investigates what's ailing reindeer at the Alaska Wildlife Conservation Center.

S08 E01 — The Big Bad Wolf Dr. Oakley and her daughters, Maya, Sierra, and Willow, travel to the AWCC, where they attempt to bond with a lone wolf.

S08 E02 — Law of the Claw Drs. Oakley and Doyle operate on a horse with a critical leg infection.

S08 E04 — A Hoarse Horse Dr. Oakley treats walking-and-breathing issues for a horse, tries to save a fox in peril, and performs surgery on a puppy.