S20 E1: The Top Ten Alien Influencers

S20 E2: The Top Ten Extraordinary Creatures

S20 E3: The Top Ten Hidden Alien Bases

S20 E4: The Top Ten Scariest Encounters

S20 E5: The Top Ten Alien Codes

S20 E6: The Top Ten Alien Disasters

S20 E7: Secrets Of The Sumerians

S20 E8: The UFO Superhighway

S20 E9: Mysteries of Scotland

S20 E10: Mystery of the Stone Spheres

S20 E11: Mysteries of the Maya

S20 E12: Unlocking the Stargates

S20 E13: The Whistleblowers

S20 E14: The Search For Extraterrestrial Intelligence

S20 E15: Jacques Vallée: UFO Pioneer

S20 E16: The Teachers

S20 E17: Egypt's Giant Tombs

S20 E18: The Linda Moulton Howe Files

S20 E19: The Chosen

S20 E20: Resurrecting Puma Punku