From A$AP Rocky to XXXTENTACION, Dr. Brain director Kim Jee-woon has picked an eclectic collection of tunes to get all your synapses firing in celebration of the new Apple TV+ show. “Some of these songs may have unconsciously contributed to the creation of the world of Dr. Brain,” Kim tells Apple Music. “Some were for relaxation, and some were just perfect references, creating the rhythm and mood of Dr. Brain.”