BIG MOUTH
theories

Park Changho as Big MouthLet’s go over one of the biggest theory so far - PCH as BM with a split personality (reference to Jekyll and Hyde - a story about an unethical scientist who experimented the other side of humanity and discovered that if someone is a really good and moral person then their other (dark) side would be worse of someone whose regular self is average or slightly more immoral, so he took a potion to reveal his other side which transformed his body into one of a more disgusting and vile being and he committed immoral acts. he then transforms back after a few days and he feels insatiable towards the potion so like a drug he keeps taking it until he dies from it, the meaning behind this book is the two sides to a human being, that everyone has an evil side no matter how good and moral they may act on the outside and that because everyone has a bad side some just show it more than others. I read this book a few years ago so I don't remember it fully and I may be wrong with some of this) so with this reference people assume that PCH is similar in the case that although we see his good and innocent side, he may have a hidden evil side which is being unleashed as BM and maybe with a split personality disorder he is unable to remember his bad acts as PCH but his other side knows and remembers everything his other mind is doing which is how BM knows everything for example when PCH planted a camera in the virgin mary statue. feel free to add more on this through the submissions form

Mayor choi doha as big mousehe has always been suspicious from the very start and now it is revealed that he has his hands on seo jaeyong's paper and the gold bars that he stole from lala capital and the nr forum. he may be 'big mouse' but it would be too obvious that it is him and it was announced too soon on the show, which could still mean he's big mouse but the rest of the show will now focus on PCH hunting down big mouse and trying to outsmart him. we need to remember that big mouse may not even be a definite person, it could be an organisation etc but the media began calling the notorious criminal big mouse and who has control over the media? nr forum, especially jihoon as he's the director of a media company and anyone with money and influence can easily sway the media into thinking a certain way. some people have debunked the fact that doha is big mouse because if some things that have happened in the past. to this i say we keep an open mind because what we see can be easily manipulated into making us think a certain way by what we see. for example a common one being used is doha being surprised at PCH knowing the names of the top 5 client and jongrak being able to fool him. this can all just be a cover up, acting, for people to believe he isn't big mouth he needs to act oblivious in some cases. if he was really big mouth and he knew he was going to give PCH the real names anyway at least jongrak, jihoon and the vips can believe that he isn't big mouth especially with how obvious he acted when he tried to 'warn' PCH of the wrong list of names, it could've just been a ploy to get the others into thinking he isn't really big mouse. doha has always been a strong candidate for big mouse and its has been enhanced throughout the show the more we know about him.this could very well be a case of the antagonist being revealed early on to us and the protagonist trying to unveil the truth and fight against them. since big mouse is a big villian it will take lots of wit and outsmarting for PCH to defeat them which may be the reason for an early reveal and as we can see from the end of episode 9 and preview of episode 10 PCH has no idea about doha being big mouse and he will be made to think jerry is big mouse which will complicate the story line even more. however we do see doha acting a bit cocky in the preview and from past experience we've seen that anytime someone starts getting overly confident they end up being tricked/ deceived so who knows what will happen. however doha is very obviously revealed as big mouse even though his entrance/ revelation was worst than all the fake big mouse's his motives seem most valid and his hobbies like staying underwater for long is a very evil villian thin to do no?

GO mihookay so im not going to say i think miho is big mouse but she is definitely suspicious, it might just be me overthinking but there are scenes in ep 9 that make me wonder. for example the scene where she spoke to doha to thank him and tell him about hyejin messaging her to tell her she reached america safely. i think we can all agree that doha most definitely did not let hyejin go that easily seeing as she saw the contents of seo jaeyongs paper. doha was suspicious in wanting to take hyejin to the airport himself and miho might've caught onto that so the message she received is most likely not from hyejin and miho knows this but she doesn't trust doha so she acts like she believes the message really is from hyejin and that she wants to drop looking for seo jaeyongs paper or wanting to know what was on it. this can be backed up by the preview we saw where she's still trying to find out whats going on with the prison patients.

People I believe are not BM - @buttermilktea1. Go Miho: She literally lives with PCH. If she did anything suspicious , PCH will be the first one to notice. She also struggled financially. If she’s really the BM, money wouldn’t have been a problem for her.2. Jerry: He wants to find BM (maybe he needs BM’s help for sth). I believe he already made a deal with BM after he got out of prison. That’s why we saw a doctor (with BM tattoo on his hand) hands over PCH’s letter to Jerry. Maybe the letter was changed into a threat/order from BM.3. Choi Doha: This guy seems sus from the beginning. I always debate whether he’s the good or bad guy. I think his intention is to become elder’s successor and bring down Jihoon. That’s why he stole the gold and hid it. I feel like it came as a surprise for him too when PCH was framed and labeled as BM.4. Warden Park: he’s obviously one of BM’s pawn.5. Park Changho: I think he’s a victim TT But he’s not an ordinary guy either ( he probably doesn’t aware of that). He may be connected to a powerful person (either BM or elder), his family background is a mystery, his orphanage is also sus.

i agree for miho, just because she's smart and witty doesn't mean she would have to be bm. she also wouldn't have a motive for being bm from what we've seen.jerry also seems to not be big mouse which i also agree with because not only does he need help from bm but he also needed money for his grandmother and sister to go to college which he would've given a lot sooner if he really was big mouse. he still kinda sus right now though because there's something he's not telling miho/ pch about bm. he did seem kinda angry at bm when he went to save pch from the mental hospital which is making me wonder what he saw/ was made to do.yes well revealing do ha as bm now would be too suspicious and usually for these shows the evil guy is shown towards the end of the show, this show gives me trust issues. i think he wants to end the elder as well like his business and family. he's not big mouth but he's definitely another villian we didn't expect because right now it seems to be him against bm, im just kinda curious to why bm hadn't made a move on bm earlier.warden park is obviously cut off from being big mouse for revealing his tattoo that shows he's probably just one of bm's workersit would be craaazy if pch was bm with the split persoality and everything because he's trying so hard to find bm and punish im, he definitely does not like bm so it ending up being him in the end would be a bit uhhhh. also there's no way he has access to everything considering he's locked up in solitary half the time. there is something about him though that isn't revealed and it will show his link to bm. there must be a reason why he was chosen to be fake bm and with his personality he's not just a cutie

more theories incoming...