When a pair of brothers from the South challenge a brother/sister duo from the North for the top spot, the showdown in the Outer Banks becomes a full-blown sibling rivalry.

Draining the oceans sheds light on the world’s first stealth weapon — German U-Boats.

An already volatile situation inside the infected research facility boils to a head. Jaax ultimately must face the ramifications of trying to balance her dangerous career and her loving family.

Jack chases his dream of being accepted by a group of wild kangaroos.

A bonobo’s exam gets off to a rocky start, and a Bactrian deer needs medical attention.

Go beyond The Hot Zone to see the incredible real-life stories of those on the frontlines fighting against one of the world’s most deadly viruses.

Phil Keoghan visits a volcano, light changes lives in Tanzania, horse cloning impacts disease and Americans prep for a nuclear attack.