"Audrey's Dance," the familiar jazz song played numerous times in every single Twin Peaks episode is heard again for the first time in this series and in 25 years.
The song played near the end, "American Woman (Remix)", was also played in Part 1.
Hospital doctor is played by Bellina Logan, who played The Great Northern Hotel desk clerk in Laura's Secret Diary (1990).
When Diane gets the ":) ALL" text message, her phone says the time is 16:32. This happens thirty-two minutes into part 16.
This is only the second and last episode in the entire 2017 series to play the familiar Twin Peaks "Falling" track.