Dr. Oakley checks out a baby muskox; the crew herds horses.

The future of a reindeer herd is in Dr. Oakley's hands.

Dr. Oakley travels to Sweden to learn about bears.

Dr. Oakley's wild cow chase; Sierra's Yukon chops.

Dr. Oakley races to find the cause of a mystery wound.

Unresponsive dog; tracking ibex in France.

Dr. Oakley races the clock wrangling bison.

An emergency cesarean section keeps Dr. Oakley up all night.