Goofs

When Wolf (and the audience) see the sulfur pit for the first time, you can see the body of The Monster sinking to the bottom. (Obviously an unused shot recycled from the end of the film.)

When Inspector Krogh first warns Wolf Frankenstein to use the alarm bell to summon him he has no monocle. He has it in the camera angle with the two of them together but not in the close-up of the inspector.

When Wolf Frankenstein is throwing darts, the position of the darts changes between shots.

On the train ride to his father's estate, the same tree passes by Baron Wolf Frankenstein's train window several times.

During the meeting near the beginning, when the Burgomeister stands up, he raises his hands. In the next shot, his hands are back on the podium.

The inspector states that the mineral bath in the laboratory has increased in intensity and is now over 800 degrees Fahrenheit. Water boiling at atmospheric pressure cannot be over 212 degrees.

Writer Wyllis Cooper's name is spelled "Willis" in the opening credits.

During Inspector Krogh's and Wolf Frankenstein's first meeting, after Krogh puts his monocle between the fingers of his prosthetic right hand in order to clean it, the wrist of the false hand (which is connected to a prosthetic arm) moves on its own while the Inspector replaces the monocle.

As Krogh is searching Peter's room for a secret door, he raps his knuckles against the walls, which are supposedly made of thick stone, and a dull echo is heard, as if the walls are actually made of wood. Once Krogh finds and opens the secret door, it is seen that the walls are made to look as if they are made of 2 foot thick stone.

Upon arrival in the village, Wolf and his family are shunned because of his Frankenstein name, and later in the story, they're ready to kill Wolf in mob hysteria. But suddenly at the end of the film, the same villagers seem to give Wolf a hero's farewell, presumably because he killed the monster. However, this totally dismisses the fact that due to his having resurrected the monster in the first place, a number of their fellow villagers are now dead.

It is seems the story line takes place in Germany, but it is mentioned at one point that Scotland Yard should be involved in the investigation.

When Inspector Krogh fires his last shot at The Monster, there is no corresponding gunshot on the soundtrack.

At the end of "Bride Of Frankenstein", the monster, along with his bride and Dr Pretorius are all assumed killed when the castle is destroyed. Yet, in this film, it is discovered that somehow Ygor found and saved the monster without any explanation on how he did that, nor is there any mention of what happened to the monster's bride and Pretorius. It seems like Ygor would have been able to at least find the bride and save her, too.

Although the culture is Germanic, Police Inspector Krogh refers to his men as "gendarmes" - which is French.