Supernatural

Someone is about to die on the season finale of Supernatural.

Meanwhile, as producer Sera Gamble put it:

"Sam comes up with an incredibly risky Hail Mary to defeat Lucifer, which involves spending some very creepy, violent one-on-one time with the guy."

It also involves Dean getting on board with his brother's seemingly crazy plan. Watch their interaction below, courtesy of Thursday's episode, "Swan Song."