The Christian woman interviewed alludes to biblical passages condemning witchcraft such as "You shalt not permit a sorceress to live." (Exodus 22:18, NKJV) and to the incident in Ephesus where "many of those who had practiced magic brought their books together and burned them in the sight of all" (Acts 19:19, NKJV).
Triskaidekaphobics beware! Fittingly, this occult-themed story was the thirteenth episode of the season and was first broadcast on the thirteenth of December.