It's the beginning of the end.

When "Dexter" kicks off its final season (Sunday, June 30 at 9/8c on Showtime), expect a huge shift in the relationships we've come to know and love over the years. Sure, Deb (Jennifer Carpenter) and Dexter (Michael C. Hall) hit a rough patch last year after she discovered her foster brother is a serial killer, but they will hit their rockiest road yet in the wake of LaGuerta's (Lauren Velez) death.

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