Henry is shown being born at 8:15. This is the same time Storybrooke was perpetually in.
This is the first episode not to feature Storybrooke.
Peter Pan, played by Robbie Kay, is the second Pirates of the Caribbean cast member to also appear on Once Upon a Time (2011). The first is Lee Arenberg, who plays Grumpy. Kay appeared in Pirates of the Caribbean: On Stranger Tides (2011) (the fourth installment) and Arenberg appeared in the previous three.
When Robin is trying to put his arrow back into his quiver, he just drops the arrow behind him, and not actually into the quiver. In the outtakes for this season, you can see Sean Maguire struggling to get the arrow into the quiver. It would seem a decision was made for him to just drop it instead.