There's someone at both doors in this clip from the Dexter episode "Teenage Wasteland." They are coming after Lumen.
Dexter tries to bond with Jordan Chase on the episode "Teenage Wasteland." He's seen here chatting with the self-help guru, following a tough work out.
The pressure on Dexter builds this week, as Quinn gets a hold of the photos Liddy snapped of him and Lumen disposing of Chase's body. Get an early look at what that will lead to on "Teenage Wasteland."

Dexter Season 5 Episode 9 Quotes

Lumen: Share something with her - what you did when you were her age.
Dexter: I killed the neighbor's dog.
Lumen: Well, don't tell her that.

Dexter (thinking to himself): Jordan is one tough nut to crack.
Jordan (out loud): You're one tough nut to crack; you know that, Dexter?
Dexter (still thinking): I wish he'd stop doing that.