The future of "Dexter" is in question as salary negotiations between star Michael C. Hall and Showtime have reached an impasse, reports Deadline.com.

The breakdown comes as Showtime is offering $20 million for two additional seasons, while Hall wants $24 million, the story notes. Either figure would make Hall one of the highest-paid actors in cable.

Showtime executives remain hopeful, with one possibility being signing Hall for one more season instead of two, the report says.