THE END -- After 15 seasons, the longest running sci fi series in the US is coming to an end. Baby, it's the final ride for saving people and hunting things. The episode was directed by Robert Singer and written by Andrew Dabb.

THE END -- After 15 seasons, the longest running sci fi series in the US is coming to an end. Baby, it's the final ride for saving people and hunting things. The episode was directed by Robert Singer and written by Andrew Dabb.

THE END -- After 15 seasons, the longest running sci fi series in the US is coming to an end. Baby, it's the final ride for saving people and hunting things. The episode was directed by Robert Singer and written by Andrew Dabb.

It's the final ride for Supernatural, the longest-running US sci-fi series. "Carry On" is the 20th episode of the show's 15th season.

Everything is on the line as the battle against God (guest star Rob Benedict) continues. A familiar face returns to join the fight.

Everything is on the line as the battle against God (guest star Rob Benedict) continues. A familiar face returns to join the fight.

Everything is on the line as the battle against God (guest star Rob Benedict) continues. A familiar face returns to join the fight.

Everything is on the line as the battle against God (guest star Rob Benedict) continues. A familiar face returns to join the fight.

Everything is on the line as the battle against God (guest star Rob Benedict) continues. A familiar face returns to join the fight.

Everything is on the line as the battle against God (guest star Rob Benedict) continues. A familiar face returns to join the fight.

Everything is on the line as the battle against God (guest star Rob Benedict) continues. A familiar face returns to join the fight.

Everything is on the line as the battle against God (guest star Rob Benedict) continues. A familiar face returns to join the fight.