http://www.teenvogue.com/story/riverdale-cast-teases-tenth-episode?mbid=social_facebook&mbid=social_facebook


I wonder who can it be

From the article

"Each week, Riverdale gets more and more mysterious. As we've slowly moved toward untangling the murder of Jason Blossom, there have been plenty of other confusing plot twists along the way — not to mention the fact that there's going to be another death on the series in the near future. All of that alone is enough to make Riverdale serious appointment television, but the cast is prepared to get viewers even more psyched about this week's episode."