This episode is the first to show a glimpse of Sokka, Toph, and Aang at an older age.
When Korra has flashbacks of Aang's life, he is missing his tattoos in some scenes.
Ikki: Why do you have three ponytails? (sniffs the air) And how come you smell like a lady? You're weird.
Tarrlok: Well aren't you...precocious.
This episode marks the first appearances of Asami Sato, Hiroshi Sato, and Councilman Tarrlok.