When “Supernatural” premiered on The WB on September 13, 2005, few could have imagined that the show would not only outlive the network that birthed it, but also go on to survive the exits of three showrunners and two network presidents to become the longest-running sci-fi series in U.S. television history. It also has the distinction of being the only show from The WB’s lineup that’s still on the air, following the network’s transition into The CW in 2006. Stars Jared Padalecki and Jensen Ackles have also remained with the series throughout its run, long after most leading men would’ve thrown in the towel (see: Chris Meloni, Michael Weatherly, David Caruso, William Petersen et al).