When Emma is with Hook in her house, her crib with the unicorn mobile is seen. Later, the wardrobe that she and Pinnochio traveled in before the curse is also shown.
The bar is called The Rabbit Hole, a nod to Alice in Wonderland.
When Henry runs into the Apprentice in the forest, the Apprentice reminds Henry that the author's job is to simply record stories, not to create them. The very definition of an author Is a person who creates stories. If all that is required is for someone to record a story, than the correct title for Henry should've been "scribe."
Even though Hook and Liam are brothers their accents are different. Hooks accent is the traditional English pirate accent while Liam's is the Australian accent of the actor playing him Bernard Curry.