Dexter: Origins, will dramatize a young, early 20s Dexter Morgan at the outset of his transition into the avenging serial killer he would become.Set in serial killer-ravaged Miami sometime in (presumably) the 1980s, Dexter: Origins will begin as Dexter graduates college to join Miami Metro, where he meets younger versions of many of the characters we came to know in the original Dexter. And, of course, the show will also focus on Dexter's family, including a very-much-alive Harry and a very formidable, teenage Deb.