S2 E1: Secrets of D-Day

S2 E2: Secrets of New York City

S2 E3: Killer U-Boats

S2 E4: Buried Secrets of the Gold Rush

S2 E5: Secrets of the Civil War

S2 E6: Lost Nukes of The Cold War

S2 E7: Secrets of The Spanish Armada

S2 E8: Pacific War Megawrecks

S2 E9: Thai Cave Rescue

S2 E10: London's Secret History

S2 E11: Secrets of Loch Ness

S2 E12: Hitler's Killer Warships

S2 E13: Lost Giants

S2 E14: Pacific Shockwave

S2 E15: Rise of The Roman Empire