While Supernatural fans wait for this CW show to return on March 25, we can at least give them something to chew on until then.

On April 15, Supernatural airs its 100th episode. What will take place during this milestone hour?

"A very important character will sacrifice themselves in a suicide mission,” executive producer Sera Gamble told Michael Ausiello. “We wanted to deliver something with real scope [on this episode]; it’s about the Archangel Michael. Crises will come to a head for Dean and Castiel. And you’ll see characters you never thought you’d see again.”

Cue the suspenseful music... Who do you think is headed for an early grave?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.