When the guard responds to the brothers singing over Brother Thomas death, Jim is kneeling next to the shoulder of Thomas at a perpendicular angle. But after the guard agrees to get a coffin for Thomas, the camera's vantage point changes to in the pit facing Jim. From this viewpoint, Jim is now angled toward Thomas, allowing him to push Thomas back down when Thomas raises his head.
The push pins on Cullen Dane's map of California were not invented and patented until 1900. This story takes place during the Presidency of U.S. Grant, which was from 1869 to 1877.
Near the end, as Jim throws a Molotov cocktail at the 2nd cannon, one of the actor's ducks in anticipation of the explosion.
When the program starts, an assassin in a tree casts two shadows on two different buildings which are perpendicular to each other. As this scene takes place during daylight hours there should only have been one.
In the culminating scene, Jim and Artie spot 4 gun emplacements in very rough terrain. With Grant's train in sight and approaching, Jim and Artie are able to quickly negotiate the terrain, and get to and destroy all 4 guns before Grant reaches the kill zone. This quick efficiency is only possible in Hollywood.
The culminating scene was obviously filmed during daylight hours using a filter to darken the film and make it appear to be night. But the sky is nonetheless blue (all be it dark blue) and NOT black. The night sky is always black and never blue. And detail in distant terrain is poor at the best, usually just fading into a dark, black background.
The opening scene had an organ grinder on the side walk. However, the curb had an endless streak of tire rubber dragging the curb. That's 20th Century phenomenon with the invention of mass produced cars.
In the opening scene, the road is asphalt, complete with apparent oil stains.
When Cullen Denes soldiers confront West in the room with the monks in the pit, they are armed with British Lee Enfield SMLE rifles of WW1/2 models.
At one point, Jim West tells Brother Angelo that by altering the wine, "you couldn't have sent out a better SOS." The show is based in the 1870s and SOS as a distress signal in Morse code, would not be initiated for another 40 years, in the 1910s.
They pick up the coffin after Jim escaped. It is 180lbs or light. The other "monk" did not notice it. After Jim knocks him out, he drags him beside the first one, so the coffin is indeed empty.
Dane addresses West as "Major West". Several episodes before and after this one establish that West was a captain before joining the Secret Service.
The guard that responds to the monks singing over the "death" of Brother Thomas is wearing the jacket of an infantry sergeant and the trousers of a cavalryman. The error would have stood out to anyone of the era, particularly the ex-military men that Dane had recruited for his conspiracy (including this particular soldier). Further "General Dane", an ex-US military officer, would have been most concerned with military regulations and would have seen this soldier as being "out of uniform." Accordingly, he would have felt that he had to address that breach of discipline (and no soldier would have wanted to attract such attention from his superiors). Finally, to venture out into the civilian world dressed as such would have again been very noticeable and would have drawn unwanted attention and scrutiny, something that a conspiracy would not have welcomed.
As the guards are taking the coffin (with Jim in it) the Sergent comes to the top of the stairs and tells his men to hurry up. They question him about burying the dead monk. The Sergent responds to just put it into the furnace. The monks could NOT have NOT heard this statement. As the monks knew that Jim was in the coffin, they should have protested, most vehemently, the bad guys not to burn Brother Thomas as that they wanted him to be buried. Yet, they remain silent as Jim's plan to escape seems to be about to "go up in smoke" (pun intended).
As the guards are taking the coffin (with Jim in it) the Sergent comes to the top of the stairs and tells them to hurry up. They question him about burying the dead monk. The Sergent responds to just put it into the furnace. Jim had to have heard this command, yet he remains still as they are about to put the coffin (with him still in it) into the furnace. The Sergent reappears and commands them away, and the men place the coffin on the ground in front of the furnace. It is ONLY here that Jim opens the coffin and overpowers the guard. But had they just shoved the coffin into the furnace instead of placing it on the ground, Jim could not have escaped, and it is this passiveness is not true to the character of Jim. Instead, the Jim his viewers had come to know and love, would have made good his escape while being carried to the furnace. Waiting until the coffin was put down could have been too late, for as far as Jim knew, it would have been put down in the furnace and NOT on the ground.
As the guards are about to put the coffin (with Jim in it), the Sergent appears and orders them away. Instead of just completing their task and putting the coffin in the furnace, they put it on the ground. There is no reason for these characters to have done this. It would take more effort to put the coffin on the ground, pick back up again, and put it into the furnace, than to just put it into the furnace in the first place.