Factual error: Tom's mother lives in Iowa, but the flowers/plants in her garden include types that could only live in places with warm/temperate weather all year round, which is decidedly not the case for Iowa.
Factual error: When Tom is locked up in an institution for the mentally ill, he is given a bed on a mixed gender ward/wing (both men and women). Wings and wards in mental institutions have not been mixed gender for more than 100 years - it is inconceivable that this practice would be existing in the 1990s in a large city in the USA.
Factual error: At the end of the episode, Tom is at a crossroads, theoretically in Iowa. However, the desert/scrub/mountain surroundings are scenery not found anywhere in Iowa.