Michael C. Hall is in negotiations for a new deal to continue on as the titular serial killing star of Showtime's top-rated drama series "Dexter" reports Variety. Hall's previous contract expires after the show's upcoming sixth season and he's been in talks for a few months for a renewal. Having worked under his original contract for the past six seasons, Hall is expected to get a major salary bump. It's presently unknown how many more seasons the show could continue ofr at this point.