The scene with Regina and Emma, where Emma is trying to get through to an emotionally wrecked Regina through her locked office door, mirrors a scene in Frozen (2013) with Anna locked outside Elsa's room, attempting to reach her emotionally walled-off sibling.
When Mr. Gold and Belle are dancing, they are wearing similar clothes to what Beast and Belle wore during the dance scene in Beauty and the Beast (1991).
The song Belle and Rumplestiltskin dance to on their honeymoon is "Beauty and the Beast" from Beauty and the Beast (1991).
Elsa and Anna's mother's diary is written in Nordic Runes.
When Rumplestiltskin waves his dagger over the box, a hat appears. The hat is the sorcerer's hat from Fantasia (1940). Furthermore, the music in the background strongly resembles Paul Dukas' "The Sorcerer's Apprentice," which is the same music heard in Fantasia during the segment when Mickey Mouse borrows the sorcerer's hat.