Once Upon a Time... (Dexter)

"Once Upon a Time..." is the second episode of the sixth season of the American crime drama television series Dexter. It is the 62nd overall episode of the series and was written by co-executive producer Tim Schlattmann, and was directed by S. J. Clarkson. It originally aired on Showtime on October 9, 2011.

Set in Miami, the series centers on Dexter Morgan, a forensic technician specializing in bloodstain pattern analysis for the fictional Miami Metro Police Department, who leads a secret parallel life as a vigilante serial killer, hunting down murderers who have not been adequately punished by the justice system due to corruption or legal technicalities. In the episode, Dexter is introduced to Brother Sam, an ex-con turned minister who helps other ex-cons start a new life. Meanwhile, Debra receives a promotion, while Gellar seeks Travis' full cooperation.

According to Nielsen Media Research, the episode was seen by an estimated 1.71 million household viewers and gained a 0.9 ratings share among adults aged 18–49. The episode received generally positive reviews from critics, who praised its performances, but felt that the themes were redundant.