High Quality Content by WIKIPEDIA articles! "Our Father" is the third season premiere and twenty-fifth overall episode of the American television drama series Dexter, which first aired on September 28, 2008 on Showtime in the United States. The episode was written by Clyde Phillips and directed by Keith Gordon. In the episode, which takes place several months after the second season finale, Dexter Morgan (Michael C. Hall) mistakenly kills an innocent man but forms a friendship with the man`s brother, well-known assistant district attorney Miguel Prado (Jimmy Smits). Dexter`s sister Debra (Jennifer Carpenter), meanwhile, has turned over a new leaf in her life and is determined to become a detective.