S33 E1: Mystery of the Megaflood

S33 E2: Sinking the Supership

S33 E3: Einstein's Big Idea

S33 E4: Volcano Under the City

S33 E5: Hitler's Sunken Secret

S33 E6: Newton's Dark Secrets

S33 E7: Storm That Drowned a City

S33 E8: The Mummy Who Would Be King

S33 E9: Deadly Ascent

S33 E10: The Perfect Corpse

S33 E11: Jewel of the Earth

S33 E12: The Ghost Particle

S33 E13: Arctic Passage

S33 E14: The Great Robot Race: Nova

S33 E15: Voyage to the Mystery Moon

S33 E16: Dimming the Sun

S33 E17: Wings of Madness

S33 E18: Family That Walks on All Fours

S33 E19: ScienceNOW: Extinction

S33 E20: Underwater Dream Machine