This is the first episode that Jackson and Ollie and most of the other Crescent wolves appear in as humans and meet Haley and the Mikaelsons.
Must have stirred some memories when Phoebe Tonkin (as Hayley) tells Claire Holt (as Rebekah) "Tonight's the full moon." Scant years before, these two, who are best friends in real life, starred in H2O: Just Add Water (2006) in which they were mermaids who had to hide indoors during nights of the full moon, when mermaids got mesmerized and acted impetuously.
This episode was filmed during the week of December 11, 2013.
Claire Holt makes her 50th appearance in TVD Universe as Rebekah in this episode.
Klaus' remark to Elijah when he finds him inspecting Tunde's body, "Can I get you anything, brother? A magnifying glass, a pipe, perhaps?" is a reference to the famous fictional detective Sherlock Holmes.