Bill (Meg's silverfox husband) mentions that he was going to read The Lightning Thief to his daughter Jade again. This book was the first in the series of famed American young-adult fantasy series Percy Jackson based on Greek mythology. His actor Anthony Head appeared as Chiron, the centaur in the Sea of Monsters (2013), the adaptation of the second Percy Jackson book of the same name.
The cafe the group frequent is now a different cafe than seen in the previous season.