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.
Continuity mistake: Madelaine's arms instantly switch from crossed to uncrossed when she speaks to Kolchak at Trevi's salon.
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: The lit flashlight dropped on the floor by the soon-to-be beheaded victim disappears in subsequent shots.
Revealing mistake: The headless motorcycle rider's torso and arms are not in proportion to a real motorbike rider. The torso is obviously made larger to accommodate the stunt bike rider.
Revealing mistake: The pre-cut hole in the garage door is visible before and after the motorcycle busts through it.
Continuity mistake: When the headless biker attempts to run over Studs Spake, the biker crosses in front of the prone Spake. The instant shot then shows the biker crossing again, but this time behind Spake.
Continuity mistake: When Lila is packing her clothes, she has a black garment in her hands, but the next quick shot shows her hands empty.
Factual error: Kolchak's narration has the episode's events begin in February in Chicago, but there is no snow, nor indication of cold weather.
Visible crew/equipment: When Kolchak goes to visit Mr. Cahill in the mental hospital, the boom mike's shadow is visible in several shots.
Visible crew/equipment: Set lights are reflected in the eyeglasses of all the characters wearing them throughout the episode.
Visible crew/equipment: A boom mike drops several times from the top into the scene of Kolchak and Pepe Torres' office.
Continuity mistake: While arguing with Tony in his office, Kolchak's arm is raised, then is lowered in the next instant cut.
Continuity mistake: Professor Rodriguez points his finger to the map twice as he explains Mexican mythology to Kolchak.
