Goofs

Whilst Warren is sitting waiting for Isabel to return home, he glances at his watch. The watch is clearly of a rectangular design. After looking at Isabel through the window as she embraces her lover, he walks to a drawer and takes out a gun., revealing he now wears a watch of a different design and it now has a round face.

When Vincent Price takes the LSD he looks at his watch and reports the time as 8:03, but his watch shows the time as being about 10:08.

Every time Martha opened the safe in her and Ollie's home the money was shown in three vertical stacks from front to back; but when Ollie opens the safe to clean it out the money is in one stack, horizontally, across the back.

The interior sets for Dr. Chapin's home and laboratory appear to be twice the size of the house used in exterior shots.

Hair and nails do not continue to grow after one dies, as Dr. Chapin asserts. The illusion of growth is created by the shrinkage of the flesh surrounding the hair and nails. However, the belief in growth after death has become so ingrained in common folklore that it is not surprising to see it used as "fact" in a horror film; such films play on our fears and knowledge of folklore to achieve their effects.

In almost every scene in which the Tingler appears, the wires maneuvering it are visible.

When the Tingler is breaking out of the cage you can see a wire at the bottom pulling it open.

When Warren is doing the autopsy on the man who has been executed, he removes his gloves and apron and there is absolutely no blood on either. Hard to believe an autopsy could be that clean.

The hypodermic that Dr. Chapin uses to sedate Ollie's wife is obviously a cheap prop with a needle that sits crookedly on the syringe.

When Ollie (Philip Coolidge) convinces Dr. Chapin (Vincent Price) to let him take his wife's body home until morning instead of calling a funeral home right away, Dr. Chapin says, "Ollie, you'd better 'notifly' the police, too."

When Mrs. Higgins is under the influence of the drug, a hand with a hatchet appears through a doorway. Mrs. Higgins backs away, and a few moments later, the hand throws the hatchet toward her. The hatchet then travels across the room and sticks to a table. The wire that the hatchet is attached to as it slides down the wire and hits the table is clearly visible.

Ollie knows his wife Martha is a deaf mute. Yet although she has her back turned to him when he wants to introduce her to Dr. Chapin, he calls her name to get her to turn around. Of course, she does not respond, and he has to tap her on the shoulder to get her attention, which he should have done in the first place knowing she could not hear him.

The title on the book that Warren is reading as he is waiting for Isabel to come home from her date is on the back cover instead of the front cover.

An experienced coroner like Dr. Chapin would not say, as he does at one point, "Organic poisons are like old soldiers: they never die. They just lie smoldering in the grave." Organic poisons degrade rapidly after the death of a poisoning victim, and many of them are completely removed by the process of embalming. In the context of the film, however, it's possible Chapin knew this and was trying to psyche out Isabel into giving herself away.

Warren's wife steals the bottle of LSD from Warren's lab and spikes his drink with it. She would not have known what it was nor its importance since she wasn't around when David brought the drug to the house nor when Warren injected himself with the drug. Also, she took no interest in his work so would not have noticed a random medicine bottle in his lab nor made the connection about its significance just from seeing the tingler sitting on the table.

At 36 minutes, as Dr. Chapin is dictating his experimental protocol into a tape recorder, he states that the average injection of LSD will be 50 micromilligrams. Experienced researchers would not use a double metric prefix of "micro-" (one millionth) plus "milli-" (one thousandth). They would simply combine them into "50 nanograms" for the overall 50 billionths of a gram being administered.