The song (Tonight You Belong to Me) that plays when Michael Langdon arrives at Outpost 3, is the same song that plays during the Pilot and Finale episodes of season ones Murder House.
Series creator Ryan Murphy confirmed that this will be a crossover between Coven (season 3) and Murder House (season 1).
Wilhemina Venable can be seen wearing the same earrings that Dr. Arthur Arden gave as a present to Sister Mary Eunice in season 2.
The masks worn by the perimeter guards are based on the masks worn by the plague doctors in Venice during the Bubonic plague.
The title sequence contains scenes from the previous title sequences of "Murder House" and "Coven".