Character mistake: Jim Sturgess uses a sentence that contains the word 'me'. He is corrected, being told that the word 'I' would have been correct. However, he was grammatically correct in his use of the word 'me'. The correction was in error.
Factual error: When the bus is shown entering Washington, DC for the competition, the shot shows the bus traveling over the Arlington Memorial Bridge with the Lincoln Memorial in the background. That bridge is on the southwest side of the city. Since NYC is to the northeast of DC, this means that to get to that bridge and enter DC that way, the bus had to drive all the way around the city and then come back in from the opposite direction. Even if the bus driver made a mistake and missed the most direct route into the city from the north, there are dozens of other ways to get to the heart of the city without adding a good 45 minutes to an hour to the trip.
Continuity mistake: Daniels' face gets splattered with blood, in a following shot there's slightly less blood, then when she uses the radio to call back the others, her face on the screen shows no blood at all. In the other shots after it's there again.
Continuity mistake: When Karl Urban is defending the Asgardians, the dust covers on his rifles vary between being open and closed several times. M16 dust covers are sprung loaded - they open on the first shot and have to be manually closed afterwards.
Factual error: After Dr. Derry's hand is crushed by Calvin, it dangles and flops every time it is seen so that the audience can see that the bones are severely broken. However, in zero-g, the hand would float rather than swing limply.
Audio problem: Anthony Hopkins is in his car with Cogman, discussing Pangea the super continent over the phone with John Turturro. There are two instances in this scene in which Anthony Hopkins' voice has been dubbed over by a different actor that does not sound like him. Anthony Hopkins first says "That's Pangea. The super continent." The scene then flashes back to the round table and the dubbed voice attempting to sound like Hopkins says "It's the same shape on the round table." The dubbed voice is heard again when he says "Genius", before reverting back to Anthony Hopkins immediately after when he says "Stonehenge."
Character mistake: When they are having the going away party for Paul, "leisure" is spelled wrong on the cake.
Continuity mistake: When Pierce first begins to interrogate Caliban in the safe house in Mexico, a large portion of Caliban's albino makeup is smudged below his nose, revealing the actor's natural skin in his first close-up of the scene; after switching to a close-up of Pierce, then back to Caliban, the smudge has been fixed.
Continuity mistake: When Luv returns to the sinking car to retrieve Deckard, and K enters and grabs Luv by the neck, Deckard's hair is wet, but visibly smooth, however, in the next shot, his hair is suddenly ruffled. (02:24:10)
Continuity mistake: When Mae and Ty meet, when Ty asks what does she think of this, Ty begins removing the lid from the bottle of wine he is holding, but in the next shot, the lid has suddenly been removed from the bottle, with his hand nowhere near it. (00:21:25)
Continuity mistake: Laureline is not wearing a safety harness when talking to Valerian, but it appears and disappears several times as the shot cuts back and forth to Valerian. Laureline then puts on the safety harness she was already wearing.
Continuity mistake: During the opening scene with Ego and Quill's mother, they run into the woods behind the Dairy Queen, and mom is wearing boots with fur trim. When they get to where the Ego's plant is in the ground, she is suddenly wearing sandals.
Factual error: When the astronaut is being questioned by a 3-star general, he keeps referring to the officer as "colonel", in fact the closed captioning does the same.
Visible crew/equipment: When "James" begins to repeat his "dark and stormy night" story to Carolyn it then cuts to him leaving her home, and just as Carolyn shuts the front door, the reflection of the moving boom pole can be seen on the glass window to the right. (00:31:20)
Plot hole: The world depicted features magic, an evil overlord who 2,000 years before tried to conquer the world, and several races. Despite these HUGE differences with our world, everything turns out of the same as our world, with nations as they are now, and a casual mention of the Alamo and "Mexicans still getting shit" for it. So our current history has not been altered a single bit by wizards, dragons and super-strong races roaming the Earth. Fine. In this ungodly implausible context, orcs live with humans in cities that mirror ours; humans and elves don't trust them, but still they live in towns with them, they go to schools, run businesses, half of the NFL is formed by orcs. Even the movie Shrek exists! And yet, at the end of the movie Nick Jakoby becomes the first Orkish police officer in the USA! There is just no way a society like this, mirroring closely our own and with orcs that existed as long as humans did, can exist with no orc ever been part of law enforcement.
Continuity mistake: When Noah and Adam are talking and Noah is playing with his fishing pole he is reeling it in. It cuts to a close up as he talks about his mother taking him to Canada and suddenly his left arm is pulled back a bit and he's holding the pole much closer to his body. (00:08:20)
Plot hole: After Rita kills Billy, why didn't any of the other rangers do something to help him? They could have very easily done CPR on him or at least called for an ambulance.
Suggested correction: (1) they did...they took him to Zordon. (2) These are high school kids. Have you ever seen any slasher flick before? Not every HS kid knows CPR.
Every high school lifeguard that ever existed.
Suggested correction: They may have not been in range with cellphone towers to get a good enough signal. Also, they had superpowers including super strength so doing CPR on Billy would have been very dangerous and would have probably hurt him even more.
Continuity mistake: The woman in black kicks Lin through a glass frame when they are fighting on the stage. When the camera changes angles to show the woman about to step through, the shape of how the glass at the top changes. (00:51:25)
Other mistake: The Space Agency is trying to use an android mechanism (Human 2.0) to go to The Void and make first contact. Their first attempt at putting a human brain into the android fails. The solution is to make the android mechanism imprint human cells to facilitate the brain/android connection. The Agency is up against a time constraint, and someone comes up with the idea of using military Humans 2.0 to go on the voyage. Wait a minute! So now we learn there are other Humans 2.0 in existence? Wouldn't whoever made those already know how to solve the human brain/android interface? Why is the Space Agency reinventing the wheel? (00:40:55)
Visible crew/equipment: When the police woman falls off the boat when the shark hits it, on the right side of the screen, you can see a hand outstretched, as if reaching out to grab her. It doesn't belong to the only other person on the boat, since he's behind the wheel and completely out of reach. So, it belonged to a person who wasn't supposed to be there.