Page 23 is the page from the book that showed Regina and Robin together after Regina chose to enter the tavern.
This is Lana Parrilla's favorite episode on the show.
According to Brigitte Hales, she had to write the "break-up" scene between Emma and Hook the day after the 2016 U.S. presidential election, and "spent all day crying and writing".
In the episode script, Hook says to Captain Nemo, "I hope you're right. Thank you, old friend", and he and Nemo hug as Nemo answers, "Goodbye." This exchange is not in the final episode.
The name of Regina's horse is revealed by her father, Henry, as Rocinante. This is also the name of Don Quixote's in the novel Don Quixote by Miguel de Cervantes.