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 nurse call device falls off the patient's bed twice as The Energy Eater attacks.
The Spanish Moss Murders - S1-E9
Continuity mistake: As Kolchak speaks with Dr. Hollenbeck, Hollenbeck's hand switches between resting on the planting table to off as the shots instantly cut.
The Spanish Moss Murders - S1-E9
Continuity mistake: The microphone the female reporter holds to record Captain Siska instantly switches hands.
The Vampire - S1-E4
Revealing mistake: In one scene, stock footage of a Boeing 747 flying is used to show Kolchak flying to his destination, and there is no commercial airline livery on the aircraft, just "Boeing 747." This footage was of one of the first 747's built.
They Have Been, They Are, They Will Be... - S1-E3
Continuity mistake: Officer Crowley is speaking through a bullhorn and taking cover behind his police car door when Kolchak approaches him from behind, asking what is going on. The next shot the bullhorn has disappeared.
They Have Been, They Are, They Will Be... - S1-E3
Continuity mistake: After Kolchak asks Officer Crowley what is going on, a police officer taking cover behind them instantly disappears when the shot cuts.
The Zombie - S1-E2
Continuity mistake: When Kolchak and Monique arrive at the shootout between the cops and the bad guys, Monique puts the camera to her eyes and exits Kolchak's car twice.
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.
Other mistake: Considering Jules Kopenic was violently murdered and had his arm ripped off, there was remarkably no blood at the murder scene as Kolchak snaps photos of the crime scene.
Continuity mistake: Madelaine's arms instantly switch from crossed to uncrossed when she speaks to Kolchak at Trevi's salon.
Bad Medicine - S1-E8
Revealing mistake: Footage of the Diablero standing up after killing the first rich woman is re-used in the killing of the next rich woman, evident by the shot of the same curtains in the background for both murder scenes.
The Vampire - S1-E4
Continuity mistake: At the press briefing, Lt. Matteo is standing next to Kolchak with a tall reporter in a gray suit standing behind them, but the next quick long shot shows the reporter in the gray suit standing between Kolchak and Matteo.
