When the woman is whipped to death by the Nazi, she is topless. Later she is wearing a top.
The German soldier gets pushed into the cage with the She-Demons. The impact forces the cage gate open, he is then attacked by the She-Demons with the gate still open. The camera cuts away and then back to the cage and now the gate is closed even though his body is in the same position. He is in the way of the swing of the gate, so it couldn't have closed.
Macklin is threatening the Doctor in the laboratory. The Doctor then says, "You're in no position...", and a guard has suddenly appeared at the back of the lab. This happens between shots.
Col. Osler says the temperature of the molten lava is over 65,000 degrees. Molten lava on the surface is 1200-2200 degrees and even at the earth's core the estimate is not much more than 10,000.
In the beginning of the movie, the narrator is reporting on Hurricane Emily. Hurricane Emily did not form until 2005, almost 50 years after this movie was produced.
The underground lab has a window into the jungle.
During the fight in the lab between Igor and Maklin, Igor tries to stab Maklin with the torch but runs into the wall, and the stone wall moves.
Macklin and the German guard are fighting in the laboratory. The fight has several sequences in which there are stunt doubles. The problem is that both stunt doubles hair doesn't even come close to matching who they are portraying. Their hair is sandy blond instead of brown.
When we first meet them the island women are dancing around a fire. The pipe feeding gas to the 'wood' fire is made clearly visible on the floor of the studio (on the right hand side of the screen) as the material covering it is disturbed by the dancers' feet.