Continuity mistake: As J and O are talking about temporal rifts, after J states Boris was on Lunar-Max, O says "If Boris could figure out how to time jump, he could seriously change the course of history." In this shot, her left hand is raised and her fourth finger is shown to be placed on her thumb. Next shot, her finger and thumb are no longer touching and her finger is now pointing to the right. (00:30:30)
Continuity mistake: When J believes K is playing a joke on him, as O says "who is he to you?", she raises her finger. In the next shot, the position of her finger changes. (00:27:25)
Continuity mistake: After Z's memorial has ended, J and K are driving. As J says "Because I was too tight", he is looking at K, doing a mime for tight with his right hand as the line ends. Next shot, he's looking straight forward, not doing the mime anymore. (00:10:15)
Continuity mistake: In the car after Z's memorial, K asks J, "You lose something over there, Hondo?" As he finishes this line, J is looking at K, sitting up. In the next shot, J is looking at K with his back resting against the car seat. (00:09:50)
Continuity mistake: After Boris has blasted a hole in the steel wall of Lunar-Max, Boris grabs onto his girlfriend's arm who is getting sucked into the vacuum of space. The first shot shows his hand wrapped around her wrist. A few shots after, his hand is further up her arm. (00:05:10)
Continuity mistake: Boris' girlfriend is first shown to have a tattoo with "Boris" over her back. A few minutes later, after Boris says "I'm a bit of a romantic", the Lunar-Max guards walks over to the cake in Boris' girlfriend's hands and the tattoo on her back is shorter. (00:00:35 - 00:03:00)
Continuity mistake: At the Apollo rocket launch platform, J calls Boris the Animal twice, who lifts J up and launches him away. J glances at K, who's got both arms stretched out trying to save himself. A shot later, in the close-up, only his right arm is stretched out. (01:28:40)
Continuity mistake: When the little alien sneaks inside the Boris' hand, the fingers are stretched out in one shot, yet bent a frame later. (00:03:50)
Audio problem: After Boris shoots his spears at J, he jumps Boris and himself off the roof and goes back in time a minute to avoid being shot with the spears. When the spears miss him he says "Right! Left! Left! Right!" but his mouth is out-of-sync when saying "Left! Left!". (01:30:00)
Continuity mistake: The shot of Apollo 11 flying away from Earth shows spent fuel stages and other debris falling away. When the ArcNet deploys after a flash of light, all the debris disappears. The shield should envelop the debris as it falls back to Earth, not make it vanish. (01:32:30)
Continuity mistake: After K remembers to leave a tip, the meteorite that was intended to land on Earth ends up hitting a satellite. The shot returns to Griffin, where he is shown to be looking uncomfortable and turns his head back round. Then as he says "That was a close one" in the following shot, he is suddenly looking calm and smiling. (01:38:00)
Continuity mistake: After K has placed the ArcNet on the Apollo rocket, he goes down a zip line and meets up with the Colonel on the beach. The shot from the zip line shows the colonel to be standing on the sand. Next shot, he's suddenly standing on the arrow signs between each zip line. (01:31:30)
Continuity mistake: In the scene where J is being questioned by K, O walks up to to K, who picks up a cup of coffee and starts drinking it. The handle is directly in front of K on the opposite end of the cup in the first shot, but in the next shot, the handle is suddenly on the other side. (00:44:50)
Continuity mistake: When Boris kills Roman the Fabulist, the spike he shot at his head is located to be just an inch or two above his eyebrows. When J finds the body a few moments later, the spike is suddenly much further up his head than it was a few moments ago. The spike has also shifted an inch to the left. (00:42:15)
Continuity mistake: When the Lunar-Max guards take Boris' girlfriend to visit his cell, one of the guards opens the door. Just as the shot finishes, the cell door can be seen open enough for two people to stand side by side. From the other side, there's only enough room for one person. (00:02:00)
Other mistake: At the diner, J is given a strawberry rhubarb. For the first few seconds after being given his plate, he is never shown putting his fork in his food, yet he still chews anyway. (01:03:50)
Continuity mistake: When K mentions his grandfather, he turns his head away from J. In the next shot, his head is closer to J. (01:02:30)
Other mistake: When K wipes little James' memory at Cape Canaveral, he uses a small neuralyzer, but we've seen at the beginning that in 1969 the MiB only have the big tubes, and K doesn't have J's future neuralyzer anymore; he gave it back already after their mono-wheels chase.
Suggested correction: What K has is probably their first and only portable neuralyzer, maybe even a prototype. The big one is their main neuralyzer. You may notice there are no dials on this one, so he has no ability to wipe a specific amount of memory.
Visible crew/equipment: When J is stopped by two cops on the highway in 1969, the camera moving backwards is reflected on J's car door once the cops approach him. (00:40:32)
Continuity mistake: When they pull up to Cosmic Lanes, they park right next to a telephone pole, but when the shot watches K get out of the car, there is no telephone pole; instead, there is a freshly planted tree.
