'Dexter' Season 7: Dexter worries about Deb, while Deb writhes around in bed

"Dexter" continues to drop hints as to what is in store for the Season 7 premiere. In this latest promo, Deb is the focus as Dexter voiceovers:

"It's my worst nightmare. Uncontrollable, inescapable. My dark passenger exposed to the one person I've always thought I could protect from it. And I don't know what happens next. I found a way to live with my secret, but I never had a choice. Does she?"

The imagery is powerful - it shows Deb writhing around in bed, trapped beneath a black sheet. Which definitely calls to mind not only what she saw Dexter do (via the voiceover) but also her own secret - that she's in love with Dexter.

Looks like some heady stuff come Sunday, September 30 at 9 p.m. ET/PT on Showtime.