For the first 2 segments, Jim is wearing a green suit with matching ascot and vest. But for the next 2 segments, though captured and without access to his wardrobe, Jim is wearing a blue suit also with matching accessories.
Trapped in the well Jim stands on upended bucket. Gordon ignites gunpowder and propels him to the surface. In reality, the bucket would come apart at the seams, leaving them both at the bottom.
In the fight between Gordon and Tigo (the hunchback undertaker) in the stable, the tines of the pitchfork can be seen wiggling like soft rubber.
The forearm of Iron Hook Harper, the one with the hook, is noticeably much longer than it should be. Obviously, the hook is at the end of a sleeve, a sleeve long enough to conceal the hand of the actor inside of it, making that forearm so much longer. This is most noticeable when Jim is found guilty and everyone, including Harper, comes up to congratulate him.
Sen. Fenlow misquotes from the Pledge of Allegiance, which was conceived and written in 1892, long after President Grant (often mentioned in the series) left office in 1877. He uses words that were not included in the Pledge until it was rewritten several times over the years. The phrase "under God," for example, was first added in 1954.
When West is sitting at the banquet table with the other assassins, there is a centerpiece including skulls with red tinted light bulbs in their eye sockets. While the light bulb did exist in the late 1870s, it was large and in very short supply.
The Secretary of State is constantly being mentioned as the immediate successor to the United States Presidency after the President and Vice-President. This is incorrect at the time of the events in this episode. In the 1870s, succession was determined by the Presidential Succession Act of 1792, in which the Senate president pro tempore was next in line after the vice president to succeed to the presidency, followed by the Speaker of the House. From 1886 to 1947 the Secretary of State was second in line after the Vice President.
"Samurai" is the term for a Japanese feudal warrior (the equivalent of a European knight), but the San Francisco Samurai's demeanor and speech reveals this melodramatic stock character to be Chinese.