Season 1
S1.E1 ∙ Standing Up in the Milky WayS1.E2 ∙ Some of the Things That Molecules DoS1.E3 ∙ When Knowledge Conquered FearS1.E4 ∙ A Sky Full of GhostsS1.E5 ∙ Hiding in the LightS1.E6 ∙ Deeper, Deeper, Deeper StillS1.E7 ∙ The Clean RoomS1.E8 ∙ Sisters of the SunS1.E9 ∙ The Lost Worlds of Planet EarthS1.E10 ∙ The Electric BoyS1.E11 ∙ The ImmortalsS1.E12 ∙ The World Set FreeS1.E13 ∙ Unafraid of the Dark