Which lost civilization built Angkor Wat, in Cambodia? What is found at the remains of Cahokia, the ancient Mississippian city? Follow along and gather evidence to answer questions about Earth's lost kingdoms, empires, and their leaders.

Hidden kingdoms -- Long-lost kings -- History raider! Britain's lost king -- Empires of the east -- History raider! Temple lost in time -- Lost in Latin America -- History raider! Losing their heads -- Rulers of the north -- History raider! Mysterious mounds -- Ancient Africa -- History raider! Deathly mystery -- Ongoing mysteries -- Mystery solved?