Factual error: In the opening shot of the movie while our characters are driving down the street in 1951, there is a post-2000, white Toyota Tercel. It's the 2nd car on the left. The car is removed from the next scene. (00:00:50)
Factual error: A utility pole appears in a scene, with electrical, telephone, and CATV (cable TV) lines. Although rudimentary cable TV systems existed in the movie's time period (1951), the 1/2" or 1" shielded cable shown in this scene didn't appear in use until the 1960's. (00:45:08)
Other mistake: When the crew is isolating the boiler in the Pendelton, the pipe wrench on the isolating valve is on backwards for the direction it is being turned.
Answer: 64.