Frank grabs a handful of sand for the obviously second time (at least).
When the character of Caroline Abendsen is pulling linens off of a clothesline, one of the linens clearly shows creases indicating that it's been ironed and folded and would have no reason to be on a clothesline.
The series is set in 1962 but Smith watches a film with the Martin Luther King "I have a dream" speech playing in a television in the background. This speech was delivered on August 28, 1963.
Juliana Crane uses a Nikon F Photomic FTN. This camera was introduced in 1968/69.