How Quick Are Your Eyes? Watch A 15-Second 'Dexter' Preview

(WARNING! If you can't guess, this may very well contain "Dexter" spoilers. First, last and only warning: if that's a problem, don't read/view onward.)

Take the famous advice of the 10th Doctor, and take it quite literally: don't blink.

To what I'm sure is your relief, there's no need for a "blink, and you're dead..." caveat. However, you could miss the briefest of brief peeks at the upcoming seventh season of Showtime's "Dexter." It premiere's Sept. 30, but in the meantime, someone crammed A LOT into this 15-second clip heralding the penultimate frame for the Miami P.D. lab rat with a "dark passenger."

Rest assured, there are people out there who will have themselves a time slowing this down frame-by-frame and speculating.

Obviously, last season left off with considerable unfinished business, and it's been confirmed that the upcoming one will pick up pretty much exactly where it left off: with Debra Morgan, fresh off acknowledging her more-than-sisterly affection for her adopted brother, walking in on Dexter making a kill and then training her gun on him. The coming season will also feature "Troy" alum Ray Stevenson as a Russian mob-connected strip club owner.

That being said....hit play. Don't blink.