The story takes place in the Blue Mountains of Oregon in 1889. This is an actual mountain range within the state. The town of Pendleton seen here lies west of the range in Umatilla County.

When Donovan discovers the damaged Terminator in a cave, he wonders if it's "a Frankenstein or something." This, of course, is a reference to Mary Shelley's 1818 novel Frankenstein about Dr. Frankenstein, who brings to life an artificial man from the stitched-together body parts of human corpses.

The newspaper seen on page 6, The Morning Oregonian, is a real world newspaper, now called just The Oregonian. Since the paper seen here has only the year, 1889, and no further date, the headlines seen here are likely fictitious. The cities of Portland and Oregon City are mentioned, as is Portland General Electric, though the company was not founded until 1892 (it was Willamette Falls Electric Company, founded in 1888, that began providing power to Portland in 1889; that company was acquired by Portland General Electric in 1892).

Page 19 reveals that the Terminator's original mission before being projected too far back in time to 1819, was to terminate Harper Duggan. Duggan lived in the latter half of the 20th Century and early 21st, as previously seen in "Memory Box".

The Walla Walla tribe, a member of which is seen on page 22, is a real world indigenous people of the Northwest states of the United States and the province of British Columbia, Canada.