it is hinted that she is part witch on her grandmother's side. In the episode "OOPA", it is shown that she has a psychic connection to an ancient computing device from Atlantis. Fi lost her father in a car accident when she was three years old. In "Strange Geometry", Fi learns that her father was obsessed with the same weird things that she investigates. The will-o'-the-wisp known as Bricriu says that this may have led to his death in "Destiny". Fi's father's death and its increasingly mysterious circumstances act as a double season-long story arc over seasons 1 and 2. She left at the beginning of season 3 to live with her aunt and try to have a "normal life". Mackenzie Phillips as Molly Phillips – Fi and Jack's mother, widow of Rick Phillips, and a singer-songwriter. She opened once in "Encore" instead of Fi. Molly had a bit of a rocky relationship with her father, apparently starting when she was a rebellious teenager. She wrote a song about him called "The Rock" in "Banshee" to make peace with him. She kept the knowledge that Rick also investigated paranormal activity secret from Fi, saying "he became obsessed with it". She doesn't share Fi's strong belief in the paranormal, but she does support her daughter. Bricriu possessed her in "Destiny" to stop Fi from learning the truth about her father's accident and supposedly to also protect her mother from the spirit world. But the part about protecting Fi is questionable since he goes so far as trapping a pyrophobiac mechanic (who pulled Rick from the car the day of his death) and Fi in a burning building. Patrick Levis as Jack Phillips – Although he is Fi's older brother, Jack doesn't believe in paranormal activity and is the series' most staunch skeptic. Jack is very protective of Fi, as well as Molly as seen in "Fathom." He once opened the show in the episode "Avatar" instead of Fi, and opened the episode "Dead Ringer" instead of Annie. Bricriu possessed him in "Will o' the Wisp" to supposedly "protect" Fi from others in the spirit world, others who didn't like her investigations of the paranormal. He meets his girlfriend Gabe in "Angels", whom he keeps in touch with long-distance and went to visit in "Fall". Erik von Detten as Clu Bell (seasons 1–2; guest star, season 3) – Carey's younger brother, Ned