The Ultimate Wolverine vs. Hulk comic that Henry is reading was published in 2009, making it three years out of date. Drug stores don't carry comics three years out of date, although it raises the question of how, if no one can come to Storybrooke, they get comic book deliveries. Another comic, Kazar the Savage, is issue #1 and was published in 1981, making it even further out of date.
Trivia: Behind the opening title, the witch's gingerbread house can be seen.
Emma: What's your price?
Emma: How about tolerance?
Gold: Well, that's a start.
Mary Margaret: The truth can be painful, Emma, but it can also be cathartic.
Emma: I agree on the painful part.
Evil Queen: Tell me why? Hmm. Why did your children refuse me?
Woodcutter: Because we're a family. And family always finds one another.
The comic that Henry is reading at the beginning is Ultimate Wolverine vs. Hulk #3. It was written by Damon Lindelof, who worked with Once Upon a Time's creators on Lost.
Joshua Dallas and Raphael Sbarge are credited but don't appear.
Canada: January 15, 2012 on CTV
Sweden: March 8, 2012 on Kanal 5
UK: May 27, 2012 on Channel 5
Australia: July 10, 2012 on 7TWO
Germany: October 23, 2012 on Super RTL
Slovakia: November 23, 2012 on JOJ