Hatem recalls casting the part of Evelyn Santos as "difficult, because technically, she doesn't exist in the pilot; she has one shot in the first episode, and in the original pilot, she was played by a different actress". Because Evelyn has no real lines in the pilot episode, extensive casting was not held. After the pilot was picked up, the producers faced the challenge of casting a character "for whom had never written anything". Producers cast Marisa Ramirez very late in the audition process, after the episode "The Ghost" had already been filmed. Ramirez was cast because the producers wanted someone "watchable" and at the same time "normal, and real" as a contrast to Paul and Keel, who had each lived unusual lives. Hatem described the three leads as a "weird, paranormal "Brady Bunch"" because of each of the characters' non-nuclear families.