Dexter

"The pieces were always there. She was just too close to see them," teases the latest promo for Dexter's upcoming seventh season.

The flashback-heavy teaser shows Deb (Jennifer Carpenter) coming to terms with her startling realization from the Season 6 finale, in which she walked in on Dexter (Michael C. Hall) during one of his ritual kills. Sheathed in plastic wrap like one of Dexter's victims, Deb painfully realizes the evidence of her brother's secret should have been obvious to her all along.

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After witnessing Dexter's "Dark Passenger" with her own eyes, it seems Deb is finally ready to put all the pieces into place. But now that Deb knows the truth, the promo asks, "Can they keep everything from falling apart?"

Watch the full promo below. Dexter premieres Sunday, Sept. 30 at 9/8c on Showtime.