It's interesting to see all the comments speculating who BM really is. I saw theories about Mi Ho being BM, the mayor, Jerry, Father-in-Law, and the Jail Guard. Personally, my bet is on the Jail Guard. However, catching up with Episode 8, I'm starting to doubt myself lmao. I saw theories suggesting that PCH himself is BM and that BM was him all along. This is definitely an interesting plot twist in and of itself and the more I read about it, the more I get convinced. I'm quite excited to see how all of these unfold.