DEXTER Season 4 Poster August 3, 2009 Dexter, News After checking out the trailer for season 4 of DEXTER, it’s time to take a look at the really awesome poster. I mean come on, “World’s Most Killer Dad,” that’s freaking brilliant! And how cute is the kid?! Season 4 of Dexter premieres on Sunday, September 27th 9pm on Showtime, and it cannot get here soon enough. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pocket (Opens in new window)