Continuity mistake: When Kolchak looks through the window blinds at the crooks on the street, his fingers change position on the blinds as the scene cuts.
Continuity mistake: When Kolchak approaches Madelaine with the witch's bag, it is upright in his hand. The scene quickly cuts and now the bag is hanging down in his fist.
Continuity mistake: Stock footage shows the same dress mannequins moving from and then staying in their same positions, even after moving and attacking Kolchak.
Continuity mistake: As Madeleine tells Kolchak about Madame Trevi being a witch, her right hand is sometimes on Kolchak's left shoulder, sometimes off as the scene cuts.
Continuity mistake: When Kolchak notices a car start up and begins driving towards him, he is close to a red and white sign that says, "Warning", but the next shot of him beginning to run from the car shows him now to be about 4 feet away from the sign and the fence it is posted on.
Visible crew/equipment: A free-standing set light is visible on the right as Kolchak approaches his Mustang outside the witch's house.
Revealing mistake: A set crew member's hand is seen operating the floating pen in the witch's coven ceremony.
Visible crew/equipment: Set lights are reflected in Kolchak's car window and door panel as he enters the vehicle.
Visible crew/equipment: A set crew member's face is visible on the lower left moving a mannequin when Kolchak is rifling through Madelaine's dressing table.
Continuity mistake: When Madeleine informs Kolchak she knows when he is lying, Kolchak's hat is riding high above his eyebrows, but when he turns to smash a mirror, his hat is now sitting much lower.
Visible crew/equipment: A boom mic is visible in the mirror behind Kolchak as he speaks with Madelaine.
Continuity mistake: Madelaine's arms instantly switch from crossed to uncrossed when she speaks to Kolchak at Trevi's salon.