Evan Peters plays his fourth character of the season.
Marks the return of Gloria Laino to the series, who plays an elder satanist in this episode. She previously played a patient at Briarcliff nicknamed "The Mexican" in season 2.
During Michael's stay in the woods, he has a vision of Ms. Mead. Her dialogue and accent as well as the bed she's sitting upon is a nod to The Exorcist where Father Karras has a similar of his deceased mother.
Hanging from the ceiling of the Satanic "Church" is a 5 color upside-down star. This symbol is the Order of the Eastern Star, which is Masonic and not Satanic.
The title, Sojourn, means "a temporary stay."