Dexter Morgan (Michael C. Hall) and his sister Deb (Jennifer Carpenter) come head-to-head in another contentious showdown in the latest trailer for Season 8 of Dexter. This Miami blood splatter expert/serial killer's journey will come to a close this season, but how will it all end? Will Deb turn in (or put down) her brother? Will Dexter emerge unscathed? Take a look at this tantalizing footage before "the end begins" with "A Beautiful Day" Sunday, June 30 on Showtime.