- In chapter 6, Johnny speaks, while he is still connected to the respirator. It would be impossible for him to speak, because when he got connected to the respirator, a tube was lead down his windpipe to his lungs. And with that tube placed inside his windpipe it would be virtually impossible for him to speak, because the tube blocks his vocal cords.
- Johnny went in to his coma in late October ( 30th to be precise ), in chapter 3, page 46, but a little later on page 66, in chapter 5 subch. 2, there is a mention of Janis Joplin screaming the blues.
It would have been possible for Janis to scream the blues at that point, but only from a recording, because she died on the 4th of October 1970.
- On page 303 ( Ch. 21, subch. 4 ) it says that it was a .357 magnum that Harry Callahan had used in the Dirty Harry movies, but it was in fact a .44 magnum that he used in the movies.
- On page 147 ( Ch. 11, subch. 2 ) it says that Weizak, after the press conference, told his wife about how Johnny looked. But on page 152 ( Ch. 11, subch. 3 ), on the same day, Weizak tells Johnny that he is divorced.
- On page 107 ( Chapter 7, subch. 1 ) Johnny "sees" a German Tiger tank aiming at the young Weizak. That was in 1939. But the germans first started producing The Tiger tanks in 1942, so it would be impossible for a Tiger tank to be in Poland at that time.
- In the very last line of chapter 15, on page 196, it says that Johnny didn't see Sarah Hazlett for three years. At that time it was around the 18th of October 1975. But when Johnny's father marries Charlene Mackenzie on the 2nd of 1977 it says that Sarah attended the wedding, that is on page 305 in chapter 22. So, when you make a quick recount you'll see that Johnny actually saw Sarah again, approximately, one year and three months later, not three years later.
- Then there is this very embarrassing error. The boy that Stillson uses as a shield is, when we meet him the first time on page 352 ( Ch. 27, subch. 5 ), called Sean, then a bit later, on page 355 ( Ch. 27, subch. 6 ), he is called Tommy, and finally at the Congressional Investigation, on page 369 ( Notes from The Dead Zone ), he is called Matt Robeson.
In the Danish translation of the book the boy is called Tommy Robeson every time he is mentioned. That just shows you how smart the Danish translators are...!
- On page 102-103, in chapter 7 you might say that Stephen King makes a very big blunder. Sam Weizak asks Johnny to imagine different objects, such as a rowboat lying at the foot of a street sign, to give an example. What Weizak is doing there is what one would call a cognitive test.
Depending on whether on not Johnny can imagine these objects, Weizak wants to see if some parts of Johnny's brain has been damaged. Johnny is at the same time connected to an EEG machine. If one should believe Weizak, then those graph's from the EEG machine should, together with whether or not Johnny could imagine the objects, determine if his brain has been damaged. So...:
1: If Weizak really wanted to learn if any part of Johnny's brain had been damaged ( and if you consider the tests he makes on Johnny, it then seems that he especially wanted to know if the parietal lobe had been damaged. Later it does turn out that it was that lobe, which had been damaged in the accident ( Notes from the Dead Zone, p. 365 & 367, subch. 4 & 5 )), by letting him try to imagine the objects he mentions to him, then the right method would have been to use a PET scanner. But at this point we encounter a historical problem, because that particular scanner hadn't been invented in 1975, when this episode takes place. The first time a PET-scanner was used was in 1977.
2: That Weizak instead connects Johnny to an EEG machine doesn't help correct the problem. An EEG machine can only measure the brains waves (such as, if you are sleepy, are REM-sleeping and so on ), so it can't tell if Johnny's brain has been damaged. This error is repeated on page 239 ( Ch. 16, subch. 15 ), when Johnny in a letter to Sarah describes how Weizak made some new tests of his brain to see if it had taken any damage, or had been damaged at all, after he helped catch Frank Dodd. When Weizak furthermore places two "electrical contacts" on either of Johnny's eyelids it makes your toes cringe of pure embarrassment. The only time such "contacts" would be of any help to Weizak, is when he wants to measure if Johnny is REM-sleeping. And since Johnny isn't sleeping, the use of those "contacts" then seems both confusing and annoying to the reader. When this has been written, it should be pointed out that Stephen King possibly could have made it all up after he had read about the cognitive tests and brain damage in, either some medical journals, or in some books which where about either of the subjects. This is off course a possibility, which ought to be obvious, since the thing that makes an author an author is his/hers imagination.
But his descriptions of Weizak's tests seem just as well documented as the descriptions that the chaste and extremely prudish missionaries made of the Africans and the Americans, whilst they observed them at a distance and let themselves be shocked and offended by the aboriginal's music and clothes.
- In chapter 16 subchapter 4, when Johnny goes out into the shed to look for the newspaper that had the article of Frank Dodd, it is noted that the paper is Sunday's paper from three weeks ago. On the next page right after the line, "THE DO-NOTHING COPS IN OUR....." it is said that this Sunday supplement article in now nearly six weeks old while just a couple of minutes ago it was three.
- In Chapter 17, subchapter 1, Chuck Chatsworth's father is alternately referred to as both Roger and Stuart.