There's been criticism of the music cues in this series, but I've enjoyed them a great deal.
The Psycho Killer tag to the unit's sequestration to the basement might have been a little on the nose, but it tonally carried the irony of an upbeat song to a depressing development in their careers, while suggesting that the fact that they still had careers at all and were getting additional liberty to pursue their hunches was a little triumphant as well.
But the best one was the Boomtown Rats to close episode 6. Kind of puts a button on the escalation of the characters' investment in their work [Torv buying a house to be closer to the FBI] and the escalation of the crazy they are fighting.
https://www.snopes.com/music/songs/mondays.asp