Colin O'Donoghue has been promoted and has been added to the main cast instead of guest starring cast for the rest of the series. He name appears after Emilie de Ravin and before Jared Gilmore.
When Emma, Henry, and Mr. Gold go look for his son, they go to Neil's apartment and figure out it is apartment 407. The number 815 is important in the show from the time Emma comes to Storybrooke to the apartment number of adult Henry. 407 is half of 815, which could be symbolic of the relationship between Neal and Rumple.