42x08: Emperor's Ghost Army
42x07: Bigger Than T. Rex
42x06: First Air War
42x05: Ben Franklin's Balloons
42x04: Surviving Ebola
42x03: Why Planes Vanish
42x02: Rise of the Hackers
42x01: Vaccines—Calling the Shots
41x22: D-Day's Sunken Secrets
41x21: Escape from Nazi Alcatraz
41x20: Why Sharks Attack
41x16: Wild Predator Invasion
41x15: Great Cathedral Mystery
41x14: Roman Catacomb Mystery
41x13: Ghosts of Murdered Kings
41x12: Killer Typhoon
41x11: Zeppelin Terror Attack
41x10: Alien Planets Revealed
41x08: At the Edge of Space
