S4 E1: The Mayan Conspiracy

S4 E2: The Doomsday Prophecies

S4 E3: The Greys

S4 E4: Aliens and Mega-Disasters

S4 E5: The NASA Connection

S4 E6: The Mystery of Puma Punku

S4 E7: Aliens and Bigfoot

S4 E8: The Da Vinci Conspiracy

S4 E9: The Time Travelers

S4 E10: Aliens and Dinosaurs