Sean tells Darla about the connection between Las Vegas and the construction of Hoover Dam.
Construction on what was originally know as Bolder Dam began in 1931 and was completed in 1935, over two years ahead of schedule. In 1947 it was renamed for Herbert Hoover who as President of the United States when construction began.
Angelica: (voiceover) It's nice to see that some things never change. Too bad we're only that young once.
Darla: I never knew Vegas could be so...freeing!
Darla: I'm often taken for someone older, due to my physical gifts.
Sean: (Laughs) Your physical gifts? Jesus you're a piece of work. Can you spell gifts? T.I.T.S..
It Almost Didn't Happen One Night is included in Sin City Diaries Feature 01: Neon Nights, a compilation taken from the series.
Elena Talan (Sasha), Justin Anthony Lopez (Matthew), do not appear in this episode.
This episode title It Almost Didn't Happen One Night alludes to the 1934 feature film It Happened One Night which had nothing in common with this episode except the similar title.