Continuity mistake: When Barbara and Diana first meet, the papers Barbara is holding change positions. When the co-worker comes looking for Barbara, papers are sticking out of the briefcase and then gone in other shots.
Continuity mistake: When they are chasing the 'muncher' ghost down the street, the light bar is only seen flashing on the Ecto 1 when seen from inside the restaurant. The rest of the time they are not on. (00:59:00 - 00:59:30)
Continuity mistake: During the punch-monkey fight, Phil Betterman lies on the floor, exhausted, with his pendant resting on the floor, next to his ribcage. In the next shot it lies by his chest. Though he could have moved it between shots, the movie implies he is so tired he is lying motionless on the floor all the time.
Continuity mistake: Look at the forehead of the hotel manager. Everytime he raises his eyebrows, you can see his prosthetic forehead piece.
Continuity mistake: Spoiler alert! At 20:54 Nile gets her throat sliced and it's on her left side, when she wakes up the bandage is in the centre of her throat. (00:20:54 - 00:22:35)
Suggested correction: You can see the majority of the cut is in the center of her throat. When her head was turned, her neck wasn't, so he didn't get much of the left side of her neck, but the bandage wraps around enough to cover the left side of her neck that did get cut.
Continuity mistake: When Joe is first in the cat and him and 22 see each other, the cat has a harness on. In the next shot when they leave the room, the harness is gone. (00:38:20)
Continuity mistake: Mara is wearing a white long sleeve jersey when in the Dalton twins' car accident and when Dylan finds her in the water washing off blood. Dylan offers her the gray sweat suit he has in his backpack, but Mara says she isn't wearing it (because they wore those clothes at the police station). When Mara stands up, she has on a dark green T-shirt with a lighter green large circular design on the front. Mara is wearing the green top when she gets to quarantine, as well as later in the movie. This is obviously Mara's top, so where did it come from after she refused to wear the gray sweat suit from Dylan's backpack? (00:33:42 - 00:35:02)
Suggested correction: After rewatching the movie, I noticed that Dylan was POSSIBLY wearing this T-shirt under his jean jacket on his first day of school; the shirts look similar, but little can be seen because it is under the jean jacket. At the same time, Dylan's backpack at the accident scene did not look full enough to contain both parts of the sweatsuit, so it is a stretch to believe the T-shirt was also inside. Moreover, Dylan told Mara that he had a crush on her for two years, so the "old" T-shirt would have just happened to be in this backpack under the sweatsuit worn at the police station. Dylan is thinner than Mara, so it is unlikely that his T-shirt would fit her. When I rewatched the movie, I noticed that the T-shirt in question looked navy blue when Dylan had it on but green when Mara was wearing it.
Continuity mistake: When Nick leaves to deliver presents he walks out the door and you hear the door close. When his wife goes after him with the flask you see him opening the very same door he's just walked out. (00:24:50)
Continuity mistake: While sitting on the couch, Peter suddenly has a clump of hair sticking up near the back of his left-sided part that disappears but reappears after some camera shifts. (00:01:20 - 00:01:42)