If you aren't already watching Dexter, then you should. Showtime's weekly series about "America's favorite serial killer" is a few episodes into its fifth season, and so far it's lookin' good. Not sure if anything can top last season's dramatic finale - but if you need a recap, or some great artwork, then check out these clever posters designed by Ty Mattson of Mattson Creative. They're so spot on and pretty to look at, that Showtime has decided to sell them in limited edition. More details to follow on Ty's blog.