The Time Machine (1960) - 19 mistakes

Continuity: The Morlocks aren't affected by the light from metal in fusion in their foundry but they recoil from the light of a match.

Plot hole: In 1966 when George is about to return to his machine and the atomic bombs (or whatever) go off, George just barely gets out of there before the lava from a nearby volcano cooks him alive. Two plot holes here. One is that in the short time it takes George to walk a few meters to his machine, a volcano explodes and the lava reaches him. Thats very speedy lava..especially considering there were no mountains near George's house. Secondly when the lava approaches, it is just flowing along the ground like normal. But when it reaches George, it splashes around him like a broken water tank. That lava can certainly defy gravity.

Continuity: When the time traveler is first starting to travel in time, the sun moves across the window from left to right, indicating that the window faces south. When night arrives, however, the view is of the stars moving right to left, indicating that the window is facing north.

Revealing: As George comes to the year 1917, the camera shows that the buildings in the horizon are nothing but poor painting, especially on the wall around the archway. The two buildings right beyond it have distinct differences above and below the top of the archway.

Continuity: At the very end of the movie, when Mr. Wells' housekeeper bids Mr. Filby goodnight, watch how quickly the upstairs lights get turned off after the downstairs lights. Considering that the time traveller was gone and she was the only one left in the house, that old woman must have RUN up those stairs faster than any human being could...

Revealing: George is underground fighting the Morlocks and kills several of them. As he leads the terrified and apathetic Eloi out and back up the ramp, one of the dead Morlocks very thoughtfully moves his legs out of way.

Revealing: When the time-traveller enters the Morlock caves via the ventilation shaft, you can see (when the screen is bright) that the background of the cave behind the machine section is merely a painted screen.

Factual error: As the machine is traveling through time George becomes aware of "strange sounds" which, when he stops, turn out to be air raid sirens. At the speed at which he was traveling through time, the sirens would have had to operate continuously for several days in order for him to have been able to hear them.

Revealing: When the machine is in the laboratory racing through time and the sun whizzes across the window, note that the clouds don't move or change formation throughout the entire 'day'. In reality, clouds can change and move dramatically in only minutes.

Visible crew/equipment: During the campfire scene a Morlock attacks Weena, and drags her off. If you look at the top of the frame, as the Morlock drags her away, the stunt man's head can be seen, as he forgot to wear the head part of the costume.

Factual error: The time traveller can hear external sounds in his machine, which means that vibrations outside of his machine's bubble of space can penetrate it. If this were true however, the machine would be destroyed in mid-travel by the shockwave of the nuclear blast.

Visible crew/equipment: At the end of the movie when they're escaping the morlocks, one of them catches on fire - he is obviously wearing a fire protection suit, since he is immensely fatter then the rest of the morlocks.

Continuity: When the Time Traveler is almost overpowered by the Morlocks, there is a shot of the torch which was whipped out of his hand. It has nearly burnt down, but as he regains it and orders the Eloi to escape, it burns strongly again.

Continuity: In the scene when George and Weena are collecting wood for a fire outside the Morlock's entrance George throws a pile of sticks to where Weena is sitting. One of these lands precisely between her legs, in the next shot the stick has gone.

Other: When the land is getting destroyed by the volcano, George is in his time machine and the disc attached to it is already spinning before he even turns on the machine and throws the lever forward.

Continuity: When Alan Young and Rod Taylor are talking outside of Filby's Department Store during World War 1, the curtains in the windows can be seen blowing in the wind because there is no glass in the frames.

Plot hole: The Eloi speak perfect English. One would think that after so many thousands of years had passed, gradually over time the Eloi's English would have degenerated somewhat. At the very least, new slang words would have been adopted reflecting their circumstances.

Continuity: When George stops his time machine at 802701 A.D. he stops it too fast and falls out of his time machine. While he's lying on the ground rain falls out of the sky and only lands on him and a little bit of the ground. When George stands up however his hair and his clothes are completely dry and steam is rising from the ground.

Continuity: When the Time Traveller gets back into the machine after the volcano scene, because the numbers are turning so fast, you can only see the first number; the first time you see this, the first number says 8, then 9, indicating 8,000 then 9,000 years, then it cuts to the Traveller for a second, and when it is seen again, it says 8,000 then 9,000 then 10,000.