On Supernatural Season 10 Episode 23, Sam and Dean finally rid themselves of the Mark of Cain.
The two-year odyssey concluded with one brother actually killing Death (and becoming Death?) and it has also led to what may be the greatest parody video in the history of parody videos.
Courtesy of The Hillywood Show, the above footage sums up the entire Mark of Cain storyline in one seven-minute video.
And it does so, naturally, to "Shake It Off" by Taylor Swift.
Is that (somehow) not enough to draw you in?
Consider this: your favorite Supernatural stars, from Jensen Ackles to Jared Padalecki to Mark Pellegrino, all jump in toward the end and show off their dances moves as well.
This is a must-watch.