National Geographic (Canada)

Dr. Oakley competes in a rodeo and treats a dog with persistent nosebleeds.

Dr. Oakley treats a sheep with a large growth and the eye of a tiny owl.

Dr. Oakley treats a pair of neglected dogs, and Willow rescues feral cats.

Dr. Oakley lassos a calf, shears an overgrown sheep and treats a dog with an eye injury.

With temperatures on the rise, conditions on the ice roads result in meltdown. The truckers from Polar and VP Express are pushed to the limit, crossing thin ice on their way to deliver critical loads.

An angry Ken considers firing a worker who disappeared with a crucial piece of equipment; Bernie finally strikes pay dirt; Big Al's camp faces a total shutdown due to equipment problems.

With temperatures on the rise, conditions on the ice roads result in meltdown. The truckers from Polar and VP Express are pushed to the limit, crossing thin ice on their way to deliver critical loads.

An angry Ken considers firing a worker who disappeared with a crucial piece of equipment; Bernie finally strikes pay dirt; Big Al's camp faces a total shutdown due to equipment problems.

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.

Enslaved warrior Spartacus rises as a gladiator to lead a revolt against Rome.

Spiculus, Nero's champion gladiator, rises to fame amid Roman combat games.

Marcus Attilius, citizen-turned-gladiator, fights for survival in Pompeii.

Beast hunter Carpophorus rises in Rome's Colosseum, but at a brutal cost.

Rome watches in horror as Commodus, mad with power, becomes a gladiator.

Gladiator Flamma rises from Syrian soldier to arena legend in Sicily.

The devastating tsunami makes landfall, catching thousands unaware.

As the tsunami hits Thailand, tourists and locals fight for survival.

The wave hits Sri Lanka, and the world wakes up to news of the disaster.

After the tsunami, survivors on an island work together to save lives.

Explorers search for the largest, most elusive land mammals alive today.

After the tsunami, survivors on an island work together to save lives.

Explorers search for the largest, most elusive land mammals alive today.