Episode 1: Standing up in the milkyway

Episode 2: some of the things that molecules do

episode 3: when knowledge conquered fear

episode 4: a sky full of ghosts

episode 5: hiding in the light

episode 6: deeper, deeper, deeper still

episode 7: the clean room

episode 8: sisters of the sun

episode 9: the lost worlds of planet earth

episode 10: the electric boy

episode 11: the immortals

episode 12: the world set free

episode 13: unafraid of the dark