Ross examines the rise of violent far-right vigilante groups, who fear foreign influences are threatening their cultural identity.

Ross examines the extreme journey that Mexicans undertake to try and make a new life in America, and meets the border patrols attempting to stop them.

The actor investigates how Colombia's drug trade undermined the war-torn country's attempts to forge a peace accord after decades of civil war.

Syria: Heading to the front line in Syria, Ross attempts to understand how the Kurds' battle against ISIS is furthering their desire for an independent nation.