Charlie (Serena's roommate) tries to keep Serena in check as her manic persona grows more ludicrous and bizarre. 

Shock Value

Serena writes this song for Billy in the psych ward, to atone for her deafness to his turmoil.

Apology

This song is a volta in Billy's character arc: he can no longer stand to function exclusively as a sounding board for Serena's observations about her relationships and her past, and bursts in frustration with Serena's blindness to the vastly more dire nature of his situation, of his darker and more trap-ridden world. 

Team Under