The tune to which the "Two Princesses" is sung to is a variation of the melody from the Elizabethan traditional song of "Rose Red".
The character "Ahamo - The Seeker" explains he is originally from Nebraska. The name "Ahamo" spelled backwards is "Omaha", the largest city in Nebraska. Also, in The Wizard of Oz, the Wizard had come to Oz from Omaha.
The main character is named D.G. This stands for Dorothy Gale, the original name of Dorothy in the L. Frank Baum books.
This film broke the Sci-Fi Channel's records by being the highest-rated television event in the network's history.
Near the beginning of Part 2, DG affectionately calls her father, "Popsicle" (derived from the more common "pop" or "papa"). This is the same name by which Glinda the Good Witch addresses her father in the salutation of a letter home early in "Wicked," a Broadway musical popular at the time of Tin Man's production and also set in Land of Oz.
Not counting DG, only four characters are referred to on screen by the same (or similar) names to their analogous characters in the original book and The Wizard of Oz: Toto, Police Officer Gulch (a reference to Miss Gulch, a character in the 1939 film), The Grey Gale, and Wyatt Cain. Cain is called "tin man" several times by other characters, most notably Glitch when he says, "Have a heart, tin man".
Glitch makes a reference to not liking scarecrows, a reference to that character's original version.
The kilts worn by the men of the resistance, with their elaborate pleats and beveled rivets, are Workman-model Utilikilts, manufactured in Seattle, Washington, USA, and available for widespread sale.
The house number of DG's Kansas home is 39, the same year the original The Wizard of Oz came out as a film. You see this briefly in the start of the storm scene
During a flashback as children, DG says to Azkadelia how smart it was to trick the trees into throwing their apples at them. This is a reference to The Wizard of Oz, when Scarecrow does the same to get apples for a hungry Dorothy.
In the original The Wizard of Oz, the Scarecrow points in many directions when Dorothy asks the way to Emerald City. In "Tin Man", Air-of-Day points in all directions when telling the travelers where to find the Seeker. Glitch, who represents the Scarecrow, responds "And you thought I had trouble with directions!"
SPOILER: When DG wakes up in the dream sequence, she has pigtails and is wearing a blue checked gingham dress, just like Dorothy in the original.
During the dream sequence, DG is asked if she's been having dreams again, and she says, "Yeah, in Technicolor." The Technicolor process made the intense colors of the original movie possible.
SPOILER: One of the hallmarks of The Wizard of Oz version of the novel was the way it transitioned from black-and-white, during the framing Kansas portions, to brilliant color in the Oz portions. This film is all in color, except when it shifts into black-and-white during the tomb sequence.
The numbers Glitch gives Cain to deactivate Azkadellia's device include several historically significant dates: 1066 (the year of the Norman invasion of Britain), 1666 (the Great Fire of London) and 1789 (the French Revolution).
DG's childhood doll wears a crown similar to the Oz crown worn by Princess Ozma in the original books by L. Frank Baum.
Dorothy Gale is referred to as the first in the royal bloodline. In the original books by L. Frank Baum, Dorothy was declared a princess of Oz and adopted as a sister by the ruler Ozma.