Berkeley and Rivers the names of Reginas guards have royal connections. Berkeley was the name of a noble family and in the 1300s Thomas Berkeley was arrested for his role in the death of King Edward II. Rivers was the name given to the father of Elizabeth Woodville who married King Edward IV.
Snow suggests that Emma's "superpower" has been known to be unreliable, but all previous instances when her people believed her superpower to be wrong have been proven correct.
Neal's room number is 8, which is one of the significant numbers from the show Lost.
The object/animal/person in this episode is the Dark Palace.