S37 E1: Darwin's Darkest Hour

S37 E2: Hubble's Amazing Rescue

S37 E3: Lizard Kings

S37 E4: Becoming Human: First Steps

S37 E5: Becoming Human: Birth of Humanity

S37 E6: Becoming Human: Last Human Standing

S37 E7: What Are Dreams?

S37 E8: What Darwin Never Knew

S37 E9: Killer Subs in Pearl Harbor

S37 E10: Building Pharaoh's Ship

S37 E11: Riddles of the Sphinx

S37 E12: Ghosts of Machu Picchu

S37 E13: Extreme Cave Diving

S37 E14: The Pluto Files

S37 E15: Hunting the Edge of Space: The Mystery of the Milky Way

S37 E16: Hunting the Edge of Space: The Ever Expanding Universe

S37 E17: Mind Over Money

S37 E18: Mt. St. Helens Back From the Dead