Reign Season Finale Pictures: What Horrific Scene Is Going Down?

The Reign season finale is May 15, and it looks like things are getting even more Game of Thrones-like on the CW show. The finale is titled "Slaughter of Innocence," and the first few pictures show some of the characters happening on a scene so terrible, their faces are all twisted and freaked out. What could it be? Take a look yourself, and ponder away.

The CW

King Henry (Alan Van Sprang) suits up as a knight.

The CW

That's Mary (Adelaide Kane) in that robe.

The CW

It's a joust!

The CW

Uh-oh . . . If Kenna (Caitlin Stasey) is having this reaction, what is she seeing?

The CW

Kenna shields young Pascal (Lucius Hoyos).

The CW

Bash (Torrance Coombs) is equally horrified.

The CW

What are your theories?