If your dark passenger is threatening to drive you up the wall unless it gets some “Dexter” action, rest assured that Showtime is coming to the rescue. The first official trailer for season six of the Emmy and Golden Globe winning series has hit the web.

Peep it:

OK …  it’s not much, but it definitely gets the blood pumping. As-of-now, there is no word on what new faces will join the cast for season six and plot points remain under wraps. However, a leaked casting call reveals some interesting characters to come (via TV Line):

• Jamie: Described as an outgoing and fun Latina in her mid-20s, this Florida native relocates to Miami for grad school.
• Chicago Mike: New thirtysomething African-American homicide detective who possesses a finely turned BS detector. The Windy City native does not play well with Dexter others.
• Louis: A buddy of Masuka’s (C.S. Lee) who joins MMP as a new lab intern. Role calls for a Caucasian actor in his 30s who is “attractive in his own way.”

The Louis role makes me nervous for Masuka. I’m hoping they don’t off the little freak. If they do, I would love to see Masuka exposed as some super-smart serial rapist or sex fiend.

(UPDATE: Colin Hanks, son of Oscar winer Tom Hanks, has been cast in an pivotal and antagonistic role. Details at this point remain hush-hush)

“Dexter” goes into production this month. Season six premieres this fall.