16Bloodlines - Supernatural
A spin-off to Supernatural began to become reality when mentioned at a panel at San Diego Comic Con 2013. It had a different title then (Supernatural: Tribes), but in 2014 was changed to Supernatural: Bloodlines. A backdoor pilot was filmed and aired as the twentieth episode in season nine of
The show was planned to take place in Chicago and would focus on monsters and hunters battling it out on the streets of the Windy City. Rather than focusing on any of Supernatural large cast of supporting characters, the spin-off would feature entirely new characters. After a lukewarm response to the backdoor pilot, he CW decided not to move forward with the show.
Currently, a spin-off called Wayward Sisters is being considered and has a backdoor pilot airing in the thirteenth season - this time featuring three beloved secondary characters from the main series.