Now that Deb knows her brother's big secret on
Dexter - that
Michael C. Hall's titular character is a serial-killing blood spatter analyst - it's the beginning of the end for the Showtime series. At Monday's Television Critics Association fall TV previews, Hall reiterated what executive producer
Sara Colleton told TVGuide.com earlier this summer: The eighth season of
Dexter will be its last. (Earlier in the day, Showtime chief ...