Supernatural has had many hits and misses in its run. But its most controversial episode was brought to life for a very specific reason.

The World of Supernatural Was Ripe For Expansion The backdoor pilot, Supernatural: Bloodlines, aired on The CW on April 29, 2014, as the 20th episode of season 9.

After a drawn-out casting process, Melissa Roxburgh has been cast as the female lead in The CW’s “Supernatural” spinoff, “Supernatural: Bloodlines” (previously titled “Tribes ...