Factual error: When the girl's injured father dies after speaking to Rhodes, the heart monitor flatlines. The male nurse calmly takes the man's pulse, shakes his head and then just leaves the room - without calling a code blue or making any effort to revive the patient. In 1872, maybe. In 1972, no way.

Revealing: In the hospital, a male nurse stands by as Rhodes talks to the patient, keeping an eye on all the beeping vital-signs monitors. But there's nothing attached to the man in the bed - no wires, no leads, not even an IV.

Factual error: Rhodes views the silent movie and the film breaks, leaving the last frame frozen on the screen. Wouldn't happen. When 16mm film broke in 1970s projectors, any portion that jammed in the mechanism was exposed to intense heat from the projection lamp, and would burn.