VIDEO : 'Supernatural' Premiere Will Have A 'Feeling Of Sadness'

The CW's "Supernatural" returns for its 13th season on Thursday and executive producer Brad Buckner says it will have a darker tone this time around. Buckner told The Hollywood Reporter, "The feeling of sadness and the feeling of loss, that doesn't go away." The network's longest-running series follows demon-hunting brothers Sam, played by Jared Padalecki, and Dean Winchester, played by Jensen Ackles as they kill monsters.