• S1.E1 ∙ Evil Places
• S1.E2 ∙ Mysterious Structures
• S1.E3 ∙ Strange Creatures
• S1.E4 ∙ Unnatural Nature
• S1.E5 ∙ Bizarre Rituals
• S1.E6 ∙ Life Beyond Death
• S1.E7 ∙ Mysteries of the Mind
• S1.E8 ∙ Incredible Survivors
• S1.E9 ∙ The Oak Island Curse
• S1.E10 ∙ Dark Prophecies
• S1.E11 ∙ Lost Civilizations
• S1.E12 ∙ Deadly Cults
• S1.E13 ∙ Extreme Weather Mysteries
• S1.E14 ∙ Mysterious Stones
• S1.E15 ∙ Vampires and Werewolves
• S1.E16 ∙ Amazing Animal Abilities

• S2.E1 ∙ The Greatest Escapes
• S2.E2 ∙ Superhuman Senses
• S2.E3 ∙ Mysterious Curses
• S2.E4 ∙ The Truth About UFO's
• S2.E5 ∙ The Underground World
• S2.E6 ∙ Leading Double Lives
• S2.E7 ∙ Mysteries of the Bible
• S2.E8 ∙ Mysterious Mummies
• S2.E9 ∙ Secrets of America's Monuments
• S2.E10 ∙ The Search for Atlantis
• S2.E11 ∙ Extraordinary Engineering
• S2.E12 ∙ The Power of Gold
• S2.E13 ∙ The Truth About Bigfoot
• S2.E14 ∙ Bizarre Vanishings
• S2.E15 ∙ Serial Killers
• S2.E16 ∙ The Mystery of Plagues
• S2.E17 ∙ Mysteries of the Moon
• S2.E18 ∙ Outrageous Robberies

• S3.E1 ∙ The Hunt for Hidden Treasures
• S3.E2 ∙ Satanic Encounters
• S3.E3 ∙ The Search for the Ark of the Covenant
• S3.E4 ∙ Apocalypse When?
• S3.E5 ∙ Secrets of the Immortals
• S3.E6 ∙ Sacred Bones
• S3.E7 ∙ Mysteries of Mars

• S4.E1 ∙ Mysterious Ancient Ruins
• S4.E2 ∙ The Mystery of Genius
• S4.E3 ∙ What Lies Below?
• S4.E4 ∙ Secrets of Abandoned Places
• S4.E5 ∙ Acts of God
• S4.E6 ∙ Serial Killer Creatures
• S4.E7 ∙ Mysterious Tombs
• S4.E8 ∙ Uncanny Curses
• S4.E9 ∙ Superhuman Feats
• S4.E10 ∙ Mysteries of the Missing Link
• S4.E11 ∙ Surviving the Impossible
• S4.E12 ∙ The Search for King Arthur
• S4.E13 ∙ Wonders of the Ancient World
• S4.E14 ∙ The Hunt for Jack the Ripper
• S4.E15 ∙ The Search for Extraterrestrial Life
• S4.E16 ∙ Real Life Monsters
• S4.E17 ∙ America's Lost Treasures
• S4.E18 ∙ The Bermuda Triangle and the Beyond
• S4.E19 ∙ Secrets of the Founding Fathers
• S4.E20 ∙ The Weird Wild West
• S4.E21 ∙ Devastating Disasters
• S4.E22 ∙ Mysterious Monoliths

• S5.E1 ∙ Lost Cities
• S5.E2 ∙ Tales of the Dearly Departed
• S5.E3 ∙ Curses Unleashed
• S5.E4 ∙ Earth's Unsolved Mysteries
• S5.E5 ∙ The Power of Prophecy
• S5.E6 ∙ Mysterious Monsters
• S5.E7 ∙ Sacred Rituals
• S5.E8 ∙ UFO Hotspots
• S5.E9 ∙ Extraordinary Structures
• S5.E10 ∙ Holy Relics