43x09: Inside Einstein's Mind
43x08: Making North America: Human
43x07: Making North America: Life
43x04: Cyberwar Threat
43x03: Secrets of Noah's Ark
43x02: Arctic Ghost Ship
42x22: Nuclear Meltdown Disaster
42x21: Chasing Pluto
42x19: Nazi Attack on America
42x18: Invisible Universe Revealed
42x17: The Great Math Mystery
42x15: Petra: Lost City of Stone
42x14: Colosseum: Roman Death Trap
42x10: First Man on the Moon
42x09: Killer Landslides
42x08: Emperor's Ghost Army
42x07: Bigger Than T. Rex
42x03: Why Planes Vanish
42x01: Vaccines—Calling the Shots
41x20: Why Sharks Attack
