Psalm - John Coltrane
In answer to the question, "If you could only send one song into the depths of space to hopefully be heard by aliens, what would you send?" John picked the final part of John Coltrane's A Love Supreme. Although, this is because Danielle excluded The Mountain Goats from the choices. If The Mountain Goats are allowed, the answer is "Up the Wolves."
To be clear, Hank's answer to this question was a song he just composed on the spot that goes: "This is the song for the golden record that’s gonna go to the aliens! YEAH!"