Continuity mistake: Whilst the train is departing Daejeon Station, two of the baseball players get attacked by zombies. When this happens, Yong-guk is running down the stairs and grabs onto the banister when he sees them getting attacked. His hand is positioned next to the part of the banister that attaches it to the wall. In a closer of shot of him, his hand is suddenly further down the banister. (00:49:47)
Continuity mistake: When the surviving passengers have managed to reboard the train after fleeing Daejeon Station, Yon-suk says "Those on board must survive", then grabs onto the attendant's jacket. His left hand is grabbing the jacket at a sideways angle, but in a close-up shot of the attendant, Yon-suk's hands have suddenly rotated 90° to be grabbing onto the jacket at a different angle. (00:48:46)
Continuity mistake: When Jong-gil gets tackled by a zombie that lands on top of and falls off the train, she drops her handbag and it lands far in front of her. In the shot from the side, where she begins to turn over, the bag is not visible beside her. When she sits up in the next shot, the bag is suddenly visible beside her again. (00:47:22)
Continuity mistake: When Seok-woo runs through the door at Dajeon Station, he helps Sang-hwa and the baseball team keep the doors shut. Seok-woo is shown pressing against the door with his forearm and elbow. His head is almost pressed against his forearm, and one of the baseball players has his hand pressed against Seok-woo's elbow. We are then shown a shot from the zombies perspective, where his forearm is much further away from his face and much lower down the door, and the hand of the baseball player pressed against his elbow is nowhere in sight. (00:46:14)
Continuity mistake: Just after the homeless man puts a coat over the soldier attacking Seok-woo, and after the shot the homeless man running through the door, Seok-woo is shown sitting on the floor behind a yellow line in front of him. When Sang-hwa tells him to come on, Seok-woo begins to stand, and he is now shown sitting directly on the yellow line whilst he is standing up. (00:45:59)
Revealing mistake: Just after Sang-hwa and the baseball team seal the doors, it cuts to a man in a checkered shirt clinging onto a set of chairs, getting attacked by a zombie. In the closer shot of the zombie biting onto the man's neck, for a brief moment, a blood pack can be seen just above the black T-shirt he is wearing under the checkered shirt. (00:45:43)
Continuity mistake: When Seok-woo is being attacked by the soldier zombie, just after he finds the book on the floor, his left hand is shown grabbing onto the soldier's shoulder. It then cuts to a close-up of the zombie, where he shoves the book into its mouth and Seok-woo suddenly has his left hand on the soldier's head. (00:45:29)
Continuity mistake: When Jin-hee, Jong-gil and the train attendant get into Car 14 after fleeing the zombies at Daejeon Station, in the shot where the attendant begins to close the door, Jong-gil is facing towards the door. But in the next shot, as the door closes, Jong-gil is suddenly facing the opposite direction. (00:47:54)
Continuity mistake: Just after Su-an and Seong-kyeong help up In-gil and the zombie begins chasing them, Jong-gil is shown sitting on the ground in the background. No-one else is shown in the background at first, but in the next shot, Jin-hee and the train attendant have suddenly appeared behind her to help her up. (00:47:39)
Continuity mistake: Just after Seong-kyeong has placed the newspapers over the sliding door, Seok-woo goes to check if Su-an is OK. He puts his hand near the top of her arm, but in the next shot, his hand is suddenly lower down her arm. (00:28:10)
Continuity mistake: When Seong-kyeong takes out a sweet for Su-an to eat, the sweet packet she is holding has the top section torn off it, with the top section still attached to the edge of the packet. The top section is shown hanging over the front side of the packet when she takes the sweet out and is still shown on hanging over the front side when she says "This is Sleepy. Say hello." When Su-an goes to touch the pregnant belly bump, the torn off section is now on the back side of the packet. (00:36:13)
Continuity mistake: When the train begins to stop at Dajeon Station, Su-an is shown sitting beside the window looking out as it begins to slow. In the next shot, her hand is suddenly placed on the window sill. The direction in which she is looking also changes between shots. (00:31:14)
Continuity mistake: Whilst the passengers are walking to the front of train, Seok-woo pulls down a chair for Su-an to sit down. After pulling down the chair, he tells her he'll give her mother a call and places his right hand on his leg when he does so. In the next shot, his right hand is suddenly in front of him and being pulled away. (00:33:43)
Visible crew/equipment: Just after Seok-woo closes the door to stop Sang-hwa and Seong-kyeong from entering the train car, Sang-hwa punches a male zombie wearing a grey suit. In the shot of the grey suit zombie landing on the floor, just as another zombie runs through the doorway, a boom mic can be seen to the right of frame, briefly entering the shot. (00:26:59)
Continuity mistake: When Sang-hwa is fighting with his first zombie, just as Seok-woo begins to walk past him, Sang-hwa's hands are shown holding onto the zombie's neck, but in the next shot, his right hand is suddenly holding onto the zombie's head. (00:25:38)
Continuity mistake: When Sang-hwa is holding onto the first zombie he comes into contact with, he grabs onto the zombie's hair and some of its hair is in the gap between Sang-hwa's thumb and finger. In the next shot, that hair in between his fingers is no longer there. (00:25:45)
Continuity mistake: When the first zombie is attacking the female train attendant in the middle of the train car, the wide shot shows the zombie using her left hand to hold down the attendant's left arm. A closer shot of the zombie attacking the woman is then shown, where the zombie is holding onto the attendant's head. (00:22:02)
Continuity mistake: When the train is pulling out of the station, Su-an is shown looking out of the window and sees a zombie attacking another man. She is lying back in the seat, then sits up when she first sees the attack. When the shot cuts to an angle outside the train, Su-an is now leaning towards the window. (00:16:00)
Continuity mistake: When the female train attendant Hyde-young bumps into the male train attendant walking out of the toilet, he tells her to adjust her scarf, to which Hye-young pulls on her scarf and rotates it. When the camera changes to a different angle, the hand that she had on her scarf is now on the back her shirt collar. (00:13:43)
Continuity mistake: When the passengers are first boarding the train, just as a couple ask the female train attendant where Car 4 is, two women can be seen boarding the train behind the attendant. The attendant then points to Car 4 and a man with a suit and backpack has suddenly appeared alongside the two women. (00:13:05)
