"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Writer Jeremy Carver, actors Mark A. Sheppard, Jensen Ackles and Jared Padalecki speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Writer Jeremy Carver, actors Mark A. Sheppard, Jensen Ackles and Jared Padalecki speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Actors Mark A. Sheppard, Jensen Ackles, Jared Padalecki and Misha Collins speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Actors Mark A. Sheppard, Jensen Ackles, Jared Padalecki and Misha Collins speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Actors Mark A. Sheppard, Jensen Ackles, Jared Padalecki and Misha Collins speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Actors Mark A. Sheppard, Jensen Ackles, Jared Padalecki and Misha Collins speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Actors Mark A. Sheppard, Jensen Ackles, Jared Padalecki and Misha Collins speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Actors Mark A. Sheppard, Jensen Ackles, Jared Padalecki and Misha Collins speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: (L-R) Writer Jeremy Carver, actors Mark A. Sheppard, Jensen Ackles, Jared Padalecki, Misha Collins, Jim Beaver and writer/director Ben Edlund speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)

"Supernatural" Panel - Comic-Con International 2012

SAN DIEGO, CA - JULY 15: Actors Jensen Ackles and Jared Padalecki speak at "Supernatural" Panel during Comic-Con International 2012 at San Diego Convention Center on July 15, 2012 in San Diego, California. (Photo by Kevin Winter/Getty Images)