When the police and townspeople rush to the Collins mansion, the crowd arrives seconds behind the police cars, even though they were all on foot.
In the opening shots of the train, the number of passenger cars changes from 4 to 5 several times.
The Amtrak engines are in one order in the overhead shot, then reverse themselves in the ground shot.
When Angelique kisses Barnabas in the study, the lipstick smudges change shape and disappear and reappear between shots.
At the beginning sequence, Barnabas and his family board a three masted ship. When the ship is seen sailing, she has two masts.
In 1776, the American Revolution was in full swing. At the same time Maine was the name of a cultural region, which was legally part of Massachusetts rather than a separate colony/state in its own right (and remained so until 1820). It's odd that neither of these facts came up at any point during the 1776 part of the story. Surely they would have merited at least one line apiece at some point.
Barnabus says that if the flatware was still silverware, he would have "burst into flames at the slightest touch."
Trying to cover, Elizabeth says that Barnabus has a terrible metal allergy.
Problem IS that when you have metal allergies, pure silver, gold & titanium are all you CAN wear.
The opening scene takes place in October in Maine, yet the forest is full of ferns and the trees are in full bloom, with no dead leaves or fall colors visible.
When Barnabas is joined by Victoria for a walk on the shoreline, there are several times during their walk where the sun shines on the back of Barnabas' neck, which would cause a reaction in a vampire in this mythology.
Obvious fake firemen at cannery fire.
The train Victoria rides during the opening credits is the Amtrak "Downeaster", which started service in the early 2000s. The cars and engines are from the 1990s, with the post-2000 Amtrak logo. When Amtrak was formed in 1971, the trains had rusty, hand-me-down streamlined passenger locomotives and cars that were near the end of their lives.
While talking with Carolyn, Barnabas recites the lyrics to "The Joker" by the Steve Miller Band, which was recorded in 1973.
Barnabas attacks a television during a live performance of The Carpenters singing "Top of the World." The song was originally released in 1972, on the album "A Song For You," but it wasn't released as a single or performed before a television audience until 1973.
When Victoria first meets Carolyn, Carolyn is listening to "I'm Sick of You" by Iggy Pop and The Stooges, which was released in 1977.
On the Amtrak train, the poster where "Victoria Winters" takes her name is for skiing in Victoria, British Columbia. Victoria is on Vancouver Island at the southern tip of BC. With its temperate climate and lack of mountains, it is not a ski destination (unlike Whistler BC, for example, which is on the mainland, and benefits from the Rockies).
When Maggie Evans arrives at Collinswood, her first conversation with Willie indicates that she has applied for the governess job under the name Victoria Winters. An earlier scene shows that she didn't invent the name until earlier that same day, on the train en route to Maine.
When Barnabas quotes the most famous sentence from the book Love Story the others react as if it were a revelation. At the time, paperback copies of the book were in the hands of practically every suburban high school girl in the country, with the sales largely driven by the success of Love Story (1970).