Helter Skelter

S7 E9: Dexter is preoccupied with Isaak still on the loose, but an internal struggle within the Koshka Brotherhood could work to Dexter's advantage. And while Miami Metro is on the hunt for a Phantom Arsonist, Dexter goes to great lengths to protect his relationship with Hannah, asking a favor of Debra that causes her to question her loyalty to Dexter.