The line comes from Dexter, the Showtime crime drama that premiered in 2006 and starred Michael C. Hall as Dexter Morgan, a Miami forensic blood spatter analyst who secretly kills other murderers. The series ran for eight seasons until 2013 and built a large online following for its narration driven style and Dexter's inner monologue. Short clips of his most direct lines circulated on meme pages and video edits, and this self introduction became a shorthand for a calm but menacing reveal that fans instantly associate with the character.