At the very end of this episode (Wiki: Plan B), Weevil is in a confessional, and as the episode closes, children who weren't shown nor were part of the scene setting are heard laughing.
Why? What's that about?
(Having recently watched the episodes up through that point, I don't recall out-of-character commentary or last-minute sound cues to be a part of the format. My only thought is it might be commentary on Weevil confessing as if saying he's "sinned" is an understatement, but that doesn't really seem to me to match.)