When Galvin and Macy summon his grandmother's spirit, Galvin converses with her in Créole; the common language in Haïti. Most media portrayals of Haitians show them speaking French, the educational language of the country.
Adam DiMarco (Zack) has also appeared in The Magicians, The Chilling Adventures of Sabrina, and The Order, all series with supernatural and magical themes.