Wink Martindale; Sarah Burns (S02E06)

S02E01 Alien Planets S02E01 Maria Menounos; Eric Balfour S02E02 Cosmic Holes S02E02 Krysten Ritter; Dominic Monaghan S02E03 Lou Ferrigno; Downtown Julie Brown S02E03 Mysteries of the Moon S02E04 Jodie Sweetin; Vivica A. Fox S02E04 The Milky Way S02E05 James Van Der Beek; Steve-O S02E05 Alien Moons S02E06 Wink Martindale; Sarah Burns S02E06 Dark Matter S02E07 Astrobiology S02E07 Lance Reddick; Harry Shum Jr. S02E08 Space Travel S02E08 Joey Fatone; Richard Hatch S02E09 Supernovas S02E09 Chance The Rapper; Mel B S02E10 Constellations S02E10 Scott Porter; Brutus "The Barber" Beefcake S02E11 Unexplained Mysteries S02E12 Cosmic Collisions S02E13 Colonizing Space S02E14 Nebulas S02E15 Wildest Weather in the Cosmos S02E16 Biggest Things in Space S02E17 Gravity S02E18 Cosmic Apocalypse