Revealing mistake: The footage of the traffic in front of Springfield Hospital where Helen Lynch is recuperating is recycled later in the episode.
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: Mr. Kitzmiller's secretary is about eye level with Kolchak when the camera shot is over Kolchak's left shoulder, but in the shots over the secretary's right shoulder she towers over him.
Character mistake: The animal control officer tells Kolchak he was crazy shooting off a flash bulb at the gorilla, but the first frontal shot Kolchak took of the gorilla did not flash at all.
Continuity mistake: Captain Molnar's arms go from being in front of his chest to down at his sides and back again as he and Kolchak speak outside the police squad room.
Continuity mistake: Outside the police squad room, Captain Molnar grasps Kolchak's left hand, but the next shot shows Molnar's hands at his sides.
Other mistake: Vincenzo is looking at a photo of the gorilla Kolchak took of it earlier in the episode. It is a side shot, but Kolchak took two pics when he encountered it, one frontal, and the other shot as the creature was running away from Kolchak and the authorities.
Continuity mistake: Mr. Burton and Kolchak each hold a photo of the ape man's foot prints, but the next shot shows Kolchak holding all of the photos.
Horror in the Heights - S1-E11
Continuity mistake: Opening scene shows Kolchak driving his convertible Mustang with the roof top up, but the next shots show the car with the roof top down and stowed.
Horror in the Heights - S1-E11
Continuity mistake: The pencil in Kolchak's left shirt pocket instantly moves from right to left as he gets advice from Miss Emily.
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 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.
Horror in the Heights - S1-E11
Factual error: Outside the Indian restaurant, the street curb is painted red. In Chicago, throughout the 1970s, curbs were painted white or yellow to indicate special parking zones; never red.
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.
Visible crew/equipment: When Kolchak goes to visit Mr. Cahill in the mental hospital, the boom mike's shadow is visible in several shots.
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: Kolchak's hands instantly change position as he speaks with Captain Molnar outside the police squad room.
