When Jim and Arty are hanging from the pipe they have the idea of unscrewing it in order to escape their predicament. When they are filmed from across the room, Arty is hanging by all fours. But when ever he is filmed up close, his shoulders are pulled up even with the pipe and his head above the pipe. These angles go back and fourth three times without Arty ever appearing to change his position.
When Jim and Arty are hanging from the pipe, they are both on the same section of pipe. But after unscrewing that section of pipe, Arty is suddenly on another section of pipe and is should still be unable to escape (due to a vertical section of piping between the two of them which would prevent him from getting clear of the piping).
When Artie used the burning strips to melt the ends of the bars to escape from the room at Dr. Articulus' house, the strips should also have melted the crossbars on which the strips rested.
At the start of Act IV, West and Gordon are hanging from a bar by the wrists. There is a cut to a waist-up scene of them hanging from the bar. Gordon reaches up to grab the bar with his left hand, followed by his right. At the same time, West appears to just reach up with both hands to grab the bar. There is no action to indicate how he was able to just reach up - no flexing of the arms or anything - he just reaches up, indicating that he was standing on some kind of platform out of the shot. Also note that when the waist-up scene first starts, both men's arms are bent as if they needed to do so to keep some tension on the chains that they were supposedly hanging from.
At the start of the program a woman walks across a bed of red hot coals. But as she walks one can see this "bed" compress where she steps and rebound as she brings up her foot. Has she actually been walking across a bed of coals, the coals might have crush and even crumbled sideways, but there most certainly would NOT have been any kind of a rebound effect (there by demonstrating that she was actually walking on a type of foam carpet or mat that would compress and rebound).
After having freed himself from the pipe, Jim drops to the floor. But Arty is still on the wrong side of the vertical pipe which should have prevented him from securing his escape. But suddenly Arty JUST drops to the floor without ever having unscrewed his section the pipe or unlocking his manacles.
When the doctor takes Arte and Jim to the morgue table to identify the body of Tiny Jon the doctor reaches for the overhead light which turns on before his hand gets there.
In the bar disguised as bookish Belden Artemus is forced to guzzle a full beer mug of sherry and experienced no effects at all.
Near the end of the episode, West mentions that the laboratory where they are being held is part of Doctor Articulus' plans to "...turn people into robots..." The word robot did not exist in English in the 1870s; it was coined in its current form in 1920 by writer Josef Capek for his brother's (writer Karel Capek) play about artificial humans, "Rossum's Universal Robots" aka "R.U.R.". It was derived from the Czech word "robota", which means "drudgery". R.U.R. is a morality play about the ethics of creating artificial but sentient slaves. It has appeared as a television production twice in the UK and has been announced as a film production for 2011.
There was no "US Dept of Health" until 1953 when the US Dept of Health, Education & Welfare" was established.
The term "classified" is used to indicate something being a government secret, but that meaning was not applied to information until the 20th century. At the time of the series setting classified only meant something had been put into a classification of some kind.
Arte quotes his report describing how the corpse "glowed like a Christmas tree ornament." Christmas trees would have been virtually unheard of at that time in the Old West and thus ornaments would be completely unknown. (In Arte's defense, Christmas trees and ornaments were common in Eastern cities such as Washington by the mid-1800s, which is where he undoubtedly became acquainted with them.)
The cards Jim uses at the end are Bicycle brand cards that weren't produced until 1885, some years after the series is supposed to take place.
Artie's cover of being an engineer checking a proposed route for a canal between Baton Rouge and the Gulf coast would have been seen by everyone as pointless, as the Mississippi River already does this, making a canal completely unnecessary.
In Act IV, when West and Gordon unscrew the pipe they are hanging from, the end of the pipe that West pulls out shows that the pipe had no threads and was not even screwed in to the fixture it was supposedly attached to. If the pipe had been connected properly, there is no way they could have unscrewed the pipe the way they did.
After having unscrewed the section of piping from which Jim was hanging, he turns a wing nut and unlocks his manacles. BUT if these manacles were NOT locked, that he could have gotten out of them simply by turning a wing nut, then there was NO need to unscrew the pipe, and therefore this whole segment was unnecessary.
Eddington asks Taro for three brandies, one small. But when Taro brings the drinks, all are of equal amounts..