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"Never go in there!"

This article contains spoilers. If you don't want to be spoiled, do not read.

The Secret Door! is the 298th video of the SML Movies, and also one of the most anticipated until the announcement of the SuperMarioLogan Movie.


Mario, Rosalina, and Jeffy are playing hide and seek. Jeffy opens the secret door.


Mario decides to make an attempt to play hide and seek with Jeffy, However, Mario gets very angry at Jeffy after he spent 3 hours of attempting to learn the alphabet. Rosalina suggests that Jeffy should instead try to hide because Jeffy never found Mario and her. Jeffy then looks for a place to hide, but he hears knocking. He finds the door and proceeds to open it. Shortly after Jeffy screams, Mario and Rosalina agree to check out what's going on.

Screaming ensues as Mario, Rosalina, and Jeffy find the dead bodies residing in the room the door led to. Rosalina and Mario proceed to call Brooklyn T. Guy for help, and they show him the room, only for Brooklyn to knock Rosalina, Mario, and Jeffy out.

After Mario and Rosalina wake up, they realize that they are chained up, with Rosalina's mouth taped shut. It is revealed that Brooklyn T. Guy killed all the people in the room and continues to slaughter those who cannot follow his only rule. Brooklyn then reveals how he got out and managed to help Mario and Rosalina with their problems, shortly before slaughtering a body with a chainsaw, much to Mario and Rosalina's shock. Brooklyn T. Guy then gives Rosalina a hammer to the head after she keeps annoying him, and threatens to do the same thing to a traumatized Mario. Just as Brooklyn is about to murder her, he is shot and killed by another cop.

The cop, who just so happens to be the real Brooklyn T. Guy, then unchains everyone and tends to Rosalina's injuries. He explains that the Brooklyn Guy from the room was actually his twin brother, Does Bad Things Guy. Does Bad Things Guy was a temporary replacement as he went on vacation for 7 months up to the point where he conveniently returned to save Mario & Rosalina. After Brooklyn leaves, Jeffy states why he went in there and his reasoning behind it was that a guy was "suffering" and "died" before he could make it.



Logan has stated the video will feature Junior and Jeffy, who do not know about the door and decide to open it. (Brooklyn T. Guy is the only one who knows what's in there, besides the 26 murdered people)

According to Amanda, Chilly's cousin, who reacted to what was behind the door, had a scared reaction. This could imply what's in there is probably scary. Logan and Chilly also showed a few lucky fans what was in there, although it is possible that the what was behind the door was changed, since Logan said it would be uploaded by a deadline of May 10th because he couldn't think of any good ideas for what could be behind the door.

The video was released on May 10th, 2017. If the video did not get released then, Chilly will show what's in there on her channel, and Chilly's brother Tito's mustache would be cut off.

YouTuber GamecubeDude300 knows a secret about the door from Anthony Miller, one of the former cast members in the SML crew, but he promised Anthony that he wouldn't reveal it to his fans. Despite this, Anthony still reacted to the video on his channel. GamecubeDude300 later said that the secret Anthony told him was that the secret room was used as a filming location for Happy Halloween! (see Trivia).

Many of the dead bodies were puppets of past characters that Logan deemed surplus, including King Strongbottom, D-MoneyBrooklyn T. Guy's Wife, the Russian SpyLogan's puppet likeness, and other, generic puppets, many of which were hacked to bits, meaning these puppets won't be used again. The gore was a combination of fake blood, Play-Doh, and real beef.

During production, during Brooklyn T. Guy's entrance, he had an additional bit of dialogue that was cut. After asking if everyone was alright, he then states, in his normal, deadpan manner, that the question is stupid. This was likely cut to keep the tension up.

After the video was released, Logan brought up the idea of making a Junior version of the Secret Door on July 10th in a Chilly vlog. This idea was eventually later cancelled.

On June 25th, 2017, Chilly released a vlog showing what had become of the room after the video; it is now used to store the larger props.


  • On Chilly's channel, Logan said that on July 10, 2017 he would make a part 2 with Bowser Junior.
  • This is said to be one of the darkest and disturbing SML videos ever to be released.
  • Logan first said that this video will be uploaded in early April, but it didn't and Logan later promised the video will be uploaded in May, because he couldn't think of any good ideas for what can be behind the secret door.
  • There are thousands and thousands of fan theories relating to the door and past SML events in the YouTube comments.
  • Despite Logan hinting at Junior's appearance, Junior did not appear in this episode.
  • This video was first teased at the end of Bowser Junior's Big Spill!.
  • This video is currently one of the most hyped videos in SML history. Some hyped videos in the past include Jeffy's Parents!, The New House!, and the upcoming SuperMarioLogan movie.
    • The video has been so hyped that, shortly before the release, Chilly as well as many other people held livestreams counting down to the video's uploading. Chilly's livestream even showed the video being uploaded to YouTube on a MacBook.
  • It is revealed that the 26 bodies mentioned in The New House! are behind the door. It is also revealed that, for the past seven months, Brooklyn T. Guy has been on vacation, and had his identical twin brother, Does Bad Things Guy, cover him, but thought the worst he would do is steal, rather than murder.
    • The Three Military school students appear as dead bodies in this episode, implying that Does Bad Things Guy may have been the Sergeant Master from Bowser Junior Goes to Military School; which might explain his villainous actions.
  • This is technically the first appearance of Brooklyn T. Guy in 2017.
  • This is NOT the only appearance of Does Bad Things Guy (This is really counting his appearance over the last 7 months, where he's been posing as Brooklyn T. Guy).
    • If you count his appearances over the last seven months, this is technically Does Bad Things Guy's last appearance.
  • In one of Chilly's vlogs her and Logan do not use anything they had found at the multiple stores they went to to get stuff for The Secret Door! which could possibly mean that there is an upcoming Secret Door sequel or Bowser Junior episode featuring Bowser Junior finding out about the door.
  • The BTS of the Secret Door video on Chilly's channel is the first SML video to get age-restricted. Most likely because of going in detail on the gory content.
  • A scene from Happy Halloween! was filmed in the room of the secret door before this video. When Junior and Cody get kidnapped by the clowns (around 9:17), the room they were taken to was the secret room. It obviously wasn't actually the secret room, just the same filming location.
  • There is a BTS video on Chilly's channel.
    • However, that video is currently age-restricted for unknown reasons. Maybe of the gore during the BTS. It could also be the fact Logan showed puppet boobs. However, it's fake gore and blood.
  • This is the goriest video since The Gun!.
  • There are now 27 people who have been murdered in the house since Brooklyn T. Guy killed Does Bad Things Guy.
    • However, 28 people have died there in total, as shown in The Magical Button!, another dead person is in the attic.
      • The 28th person who died committed suicide.
  • The "body-meat" was ground-beef. It's also has make-up and slashed in-half body.
  • Jeffy's Fun Day! was originally going to have Jeffy staring at the secret door for an hour, but Logan decided not to do that because it would break the continuity of Jeffy not knowing that the secret door existed.
  • This marks the first appearance of Does Good Things Guy, as he kicked the door open killing Does Bad Things Guy, and saving Jeffy, Mario, and Rosalina.

Deleted Scene

  • As revealed in a Chilly vlog, Bowser Junior’s absence is partly due to this deleted scene. Logan originally wanted to film a scene where Jeffy and Junior call the doctor. Brooklyn T. Guy would then climb out the window and hold Mario hostage. This concept ended up being scrapped as Logan wanted to get the video finished in time to meet the May 10th deadline.


  • Brooklyn Guy said that Does Bad Things Guy replaced him for seven months and that he killed 26 people in that time frame. Does Bad Things Guy gave the house to Mario in October which was 7 months ago, which means that Mario was the first person he gave the house to. Although it could be that Does Bad Things Guy sold the house in pairs.
  • If you look in the background when Rosalina was about to die, the door opens and it is actually Chef Pee Pee in a cop outfit.
  • Does Bad Things Guy was not inside the secret room when Mario and Rosalina came in and then called him, despite Does Bad Things Guy saying that he sneaks out the window when they need something.


Do you like The Secret Door?

The poll was created at 20:42 on May 12, 2017, and so far 153 people voted.
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