Wife Killer - S3-E17
Factual error: The Baker City Herald's office door misspells the word "personnel" with a sign reading, "Authorized Personel Only." Pretty poor editing for a newspaper office. (00:29:25)
Factual error: Madison's 1966 Lincoln Continental is equipped with a car phone, a luxury that, in the 1960s, required a very large external antenna. Somehow, though, Madison's phone works without one. (00:47:45)
In a Plain Paper Wrapper - S3-E29
Factual error: Even though it's Sunday, Gary is somehow able to pick up a package at the post office, which is open when it shouldn't be. (00:27:40)
Answer: Production vehicle models aren't in sync with the calendar year. The '65 Mustang began production in March 1964 and first sold in April 1964, before it was "introduced" the following year. I don't know which model was seen in the episode, but the 2+2 fastback was sold in September 1964. The 1964 film "Goldfinger" uses a 1965 Mustang as part of Ford's product placement. Basically, in the 1930's, FDR ordered automakers to release vehicles in the fall of the preceding calendar year "as a means of facilitating regularization of employment in the industry." Now, automakers can release new models as early as Jan 2 of the preceding year.
Bishop73