The Flash - Season 6, Episode 1: Soundtracks

Caitlin is having coffee with Ramsay Russo at Jitters and they are talking about a potential cure for cancer that uses dark matter.

Cisco turns on music as he and Iris monitor the Flash as he races into a black hole created by Chester to retrieve Chester's conscious energy; Iris calls out to Barry while in the black hole.

Cisco turns on music as the Flash rushes into the black hole to gather Chester synaptic energy to return it to him; Iris calls out to Barry as she and Cisco wait for him to return from the black hole.