The panel displayed a 6×6 row of various colours and at the end of the sequences, the panel will appear the colour blocks to be selected. The cast also search the metal lockers for hints. Hope, Dong-hyun & Byung-jae safely return to Control Room. Shin-dong found an air vent on the wall. [5] There is no longer any assignment of the captain (주장). While the cast are discussing, an elderly man is staring at them and it turns out to by the History teacher (Ge Su-sang) of the Tae-yang High School (Season 1 episode 11-12). Dr. Jo tells the nurses that Ho-dong has to fast without food for 24 hours. Jong-min and P.O are captured by Jo Jae-hak. Jong-min managed to be the first to put on the robe and scared the remaining members and Ha-li out of their wits to the Preparation Room as they thought they were being discovered. Near the phone booth, a document on "Report on the murder case" and laptop were placed on a table. The cast suspect that Detective Choi was talking to Detective Kim of the future. The cast think it might be linked to UFOs or secret experiments. Byung-jae started to investigate the records in the 3 consultation files and observed that all 3 girls has some family issues. Dong-hyun searched the lab coat of Lee Byung-sil and found a collection of keys to the facilities of Hope Institute. They were unable to find any alternate route. Byung-jae will retrieve the Bluetooth speaker and lure the zombies to the 3rd floor of Control Room. As the white smoke is deadly, the AI robot informs the cast that the gas protection vests and masks are located in the Storeroom next to the Security Room. Jong-min & P.O are surprised that the existing inmates are able to smuggle a cellphone into the room. Dong-hyun investigated further and accidentally found the third key. Their room-mate (Um Dae-do) is hiding under the bed. The chief warden (Gu Gyoung-man) chatted with Dong-hyun & Ho-dong as both are well-built. The passcode did not open the door. The anti-drowsiness nourishment tonic takes effect after 5 minutes to cause the users to be unconscious. Byung-jae found more clues from the computer. P.O & Byung-jae are curious in the contents of the box and Dae-do finally came out of his hiding after P.O & Byung-jae agree not to touch the box. Pig Roaster, Versailles Loo and First Day at School. After completing the colour puzzle, the door to Isolation Room opened. At the parking lot in Hohyun-dong, the cast are separated into 2 groups. All the teachers are very respectful to chief priest Ge Su-sang. The nurses and Jong-min go to the Basement via the staircases and the path to the 5th floor is with bloody footsteps. The fridge in the room is number-locked, Ho-dong & Shin-dong has to figure out the clue pasted on the fridge door. He tried to topple the domino tower with the fishing rod as Jong-min and P.O frantically protect it. The cast approach the exit door and discovered that there are 20 dials on the iron door. Ha-li reply was she drank the "anti-drowsiness nourishment tonic" given by the history teacher and became unconscious and Mi-ra also did the same thing. Meanwhile, Shin-dong & Dong-hyun managed to shift the wooden chair to be next to each other and free themselves from the wooden chair. After trying several combination on the golden safe, the cast managed to open the safe using D008 combination. The cast eventually use the long pole from the Gym Hallway to retrieve the access card. The cast used the hair spray and water spray to find and avoid the light beams of the security devices. The cast communicated with the Black Tower. Dr. Jo has sacrificed his life trying to expel the evil spirit. Byung-jae did well to entertain the existing inmates and is given privileges to be served or serve the henchman. Ho-dong was sad that they should have bring the antidote along and save Mi-ra. The movie file is password protected to be downloaded. He enjoyed the soda drink and snack while Ha Seok-jin found the radio and turn it on. Kim Ji-seok carried the backpack to Room 304 to investigate and found some soda drinks and snacks. After Jong-min is able to remember the prayer, Dr. Jo bring Jong-min to place to defeat the evil spirit. After all the cast escaped from the refrigerated storage, they continue to search the place. The safe contains the vaccine and prescription. Shin-dong hold a blanket high to block the view while Byung-jae & Jong-min enter the office room while P.O sweeping the acts as a look-out. Some of the escape missions are related to other escape missions or belong in the same world, based on the story lines and/or the characters involved in the escape missions. Members found out that the "anti-drowsiness nourishment tonic", "Holy water" and courage pill were already made in advance and left one the table. A henchman enters the scene to check on the prison cell. As he opened the cabinet, a cabinet full of tennis balls spills out. [3], Before each phase of the escape challenge, the members first gather in the bus. In the centre of the room, there is a chair and the typewriter placed on a wooden table. It is the golden safe from the cellphone. When exiting the room, members witness four people in dark robes exiting from the upper floor and walked towards the other end of the corridor. Byung-jae scanned the card from the diary (from Officer's Barrack) to the door for the Isolation Room. After opening the door, the cast found another key on the back of the door. They took the mirror from the cabinet where they kept their shoes. Byung-jae, Shin-dong & Dong-hyun made fun of Ho-dong as they are able to walk past the light beams without any troubles. P.O tell Byung-jae that he saw the confiscated box in the nurses' office. The cast dashed out of the Officer's Barrack. Dong-hyun followed the GPS navigation to the place shown on the photo. The cast encourage Dong-hyun to fight in the match to find out. The key from Director's Office opened the door for Special Treatment Unit. After Shin-dong typed the answer to the line-up card, a door slide up and reveal a small hidden room. Byung-jae searched the closet and found the laboratory key in one of the items of clothing. After entering the Secret Room, Kim Ji-seok found an electrical outlet on the wall. After unscrambling the number-lock, the cast return to Kitchen Storage to take a snack break. The recording of the challenge ends once it happens. The cast followed the prison warden to the waiting room. Shin-dong saw the EXIT sign on the basement 2 and guess they will be escaping through there. A veteran idol with the sharpness of finding evidences as being demonstrated by this incredible being! Ho-dong found a room full of food and visited the fridge. There have been 10 missing people report in Paju and Detective Choi thinks these are not simple missing people cases. After removing the flowers pot from the shelf, the cast found a door handle hidden behind the flower pot. The cast have to surrender any valuables to the prison warden and is being scanned for any contraband items. Jang Jang-bal contacted the outsource workers, using the cellphone from Detective Choi, on the plan to escape the prison. They observed that there are mirrors behind the cabinet doors. Ho-dong & P.O also managed to free themselves from the wooden chair. Dong-hyun was escort to the chief warden's office. After entering the passcode to the phone booth, the door to Room 304 opened. The second message says that he is here to help Ho-dong and get everything they need. As the cast enter the staircase, a female voice asking for help. The cast observed that Dr. Baek had put his cellphone and a music box on the shelf. Jong-min observed that the cabinet door (outside the prison cell) below the washing basin opened by itself. Members deduction about this challenge is to find the whereabouts of Heo Sa-ra. The only way to escape the prison is to be a "corpse" in the morgue. An emergency call was addressed to all male nurses to proceed to the Basement. The second key was found in the frame of the painting. In the middle of the exercise ground the is a fighting ring. Members found the clue (4-4-6-9) by erasing the whiteboard. Suddenly a zombie appeared from the last door of the corridor and the cast dashed back to the Cafeteria. While sweeping the floor of the laundry room, P.O peeking into the office room and share his findings to the remaining cast. A small but powerful entertainer who does not lose to anyone as much as in the closet! They are given the prison clothing to be worn. The zombie is wearing a watch and the time shown on the watch is quarter part three. 9 girls (including Sa-ra) were listed as the missing people for the past 4 years. The opened door suddenly closed. They are transported to the Prison Cell with the blindfolds. Season 1 was aired on tvN Sundays at 10:40 pm (KST) starting 1 July and ended on 23 September 2018. After the security staff left, the cast continues with their search of the house. Ho-dong suddenly remembered about the long pole found on the Gym Corridor. Detective Choi talked to Detective Lee who lived in 1999. Two white jet of powder sprayed from the wall. P.O crawl through the secret entrance and found a dead researcher (유지식).