Dec. 19, 2011 at 9:36 AM ET
"Dexter" fans who've long wondered just when the killer's sister, Deb, would finally figure out his big secret need wonder no more after Sunday night's season finale.
That's because just as Deb started to get really comfortable with her feelings for Dexter -- you know, those creepy and not-so-family-like feelings -- she caught an eyeful of his handiwork.
Deb looked on in shock, as Dexter made short work of Doomsday Killer Travis, and even better -- Dexter saw her there. He knows she knows!
So what does this last minute shocker mean for the everyone's favorite serial killer? It seems safe to say big changes are ahead. After all, there are still two more seasons of "Dexter" to look forward to, and as Showtime's entertainment president David Nevins recently revealed, the events from the end of this season set up the beginning of the end of the series.
What did you think of the finale? Will Lt. Deb be blinded by love or act on what she knows? Share your thoughts on our Facebook page.