http://tvline.com/2013/07/21/supernatural-spin-off-cw
The CW is developing a spin-off of the long-running drama, TVLine has confirmed. Executive producer Bob Singer first announced the project during a press event at Comic-Con on Sunday.
Details are few and far between right now — it's still early in the process — but here's what we've gleaned: A new character will be introduced in or around Episode 20 (which will serve as a planted pilot for the new show). That character will then anchor the spin-off.
While the Winchesters are fond of running around the great outdoors, we're hearing that the new endeavor will have a more citified feel.