S27 E1: Fall of the Leaning Tower

S27 E2: Time Travel

S27 E3: The Killer's Trail

S27 E4: Island of the Spirits

S27 E5: Decoding Nazi Secrets

S27 E6: Voyage of Doom

S27 E7: Electric Heart

S27 E8: Tales from the Hive

S27 E9: Lost on Everest

S27 E10: Secrets of Lost Empires: Medieval Siege (1)

S27 E11: Diamond Deception

S27 E12: Secrets of Lost Empires: Pharaoh's Obelisk (2)

S27 E13: Trillion Dollar Bet

S27 E14: Secrets of Lost Empires: Easter Island (3)

S27 E15: Mystery of the First Americans

S27 E16: Secrets of Lost Empires: Roman Bath (4)

S27 E17: Lost Tribes of Israel

S27 E18: Secrets of Lost Empires: China Bridge (5)

S27 E19: What's Up with the Weather?

S27 E20: Stationed in the Stars

S27 E21: The Vikings