Anachronisms
Sure, they happen, despite the best of intentions and preparation, so I'm not going to gripe - a review I read mentioned that a shot of early 1960s New York City included the World Trade Center.
However, although I'm hardly that far along, as I've only just begun the first episode, I've already found a glaring anachronism that fans and collectors of a certain beloved American novel (such as myself!) will be quick to notice:
Episode 1 begins on VE Day, 1945 - 6 minutes and 52 seconds in, Julie Prescott (Susan Blakely) is shown reading GONE WITH THE WIND to a wounded soldier. Problem is, she's reading an almost-new copy of the Avon Books mass-market (rack-size) paperback edition that Avon Books didn't publish until April, 1973!!! She should have been reading to him from a hardcover copy of more contemporary vintage, as other than an oversized movie-tie-in edition printed in December 1939 and January 1940, GWTW wasn't available in paperback (least of all rack-sized) until the early 1950s, when it was issued by Perma-Books with a cover price of 75-cents!
"'Nature,' Mr. Allnut, is what we are put here to rrrrrriiiiise above!"