Continuity mistake: When Luke snaps the broom into two pieces, it's not a clean break, leaving a few inches of bare wood in the bottom part. A few shots later when we see both parts again, it's a much cleaner break.
Continuity mistake: Frost bumps into Mullett's car and breaks a brake light. Part of the red casing falls to the floor. When Frost walks over to look at the damage and sweep it away with his foot, a light bulb is now on the floor. (00:09:50)
Continuity mistake: When Murdoch and Crabtree arrive to the fairground to apprehend Agnes, they lean their bikes against the "annual fair" banner stretched on a handrail. The camera shows the detective and the constable from behind, making visible that the weight of the bikes make the banner to ruck down significantly. However, when the next cut shows them frontwise, the banner is in neutral position. (00:40:30)
The Mess of Adrian Listenger - S5-E18
Continuity mistake: Max and 99 are sitting on the sofa. There is a knock at the door and Max fires 3 bullets into the door from a gun. Later, the same day the door is shown behind Max and 99 and there no gunshot holes in the door. Also, 99 changed her clothes and Max still has on the same clothes. (00:09:00 - 00:19:00)
Santa Claus - S1-E12
Visible crew/equipment: When Mark Harris shows Matlock into his office, the actors' three tape marks (one T-mark) are visible on the carpet behind the chair, and at the bottom of the screen.
Prodigal Son - S5-E3
Visible crew/equipment: After Agent Hobbs reads the text that Zack sent to Clayton, Jubal tells ADIC Reynolds they need to evacuate Chapman, and in the next shot facing Reynolds there's an orange T-mark taped to the floor behind him. (00:19:35)
The Debate - S6-E12
Visible crew/equipment: After Alicia and Frank have begun their mini debate in the kitchen, the hotel employee enters the kitchen; then, as Alicia says, "The system needs to be tweaked, not overhauled," the camera rounds the corner, and we can see a red T-mark and a red tape marker on the floor. (00:23:30)
Continuity mistake: When Jonah confronts Meyer after the death of the surgeon, Meyer's holding a drink in his left hand as he turns to face Jonah. The shot changes angle and the drink is suddenly in his right. (00:48:40)
Continuity mistake: Neal chats with the publicist while Burke goes to meet the journalist. Her hair is either tucked behind her right ear in shots from the left, or not in shots from the right.
Factual error: Gay pride flags are visible in a window. The 6 color flags shown were introduced in 1979 (though an 8 color flag preceded it in 1978). (00:30:44)
Continuity mistake: The scene where Danny is lying on the sofa in the flat listening to music. Stacey throws down an envelope of money onto his chest. The banknotes spill considerably out of the envelope in the first shot. Two shots later and without either Danny or Stacey having touched the money, the banknotes are mysteriously tucked back inside the envelope.
Continuity mistake: As the police arrives on the crime scene, the body is lying with both arms spread on the floor. When Jack kneels by it for the examination, the dead man has one hand to his chest. (00:05:35)
Visible crew/equipment: When Marie goes to tell Reb about Allie seeing Lou in the showers, in a slow-mo shot of them both filmed through some bars, you can see a boom mic above Reb's head.
Continuity mistake: Detective Morales gets in the suspect's face and holds up two fingers. The view switches to the suspect's face and now Morales has three fingers in his face. (00:04:45)
Revealing mistake: The stuntman smashing through the window is quite obvious - he does not even have the hair styled like Hastings'. (00:31:30)
Ashes, Ashes - S1-E6
Continuity mistake: Spoiler! At the end of the episode, after Elektra decapitates Alexandra, the blood pattern on her changes changes when she turns around and asks "any questions?" Most noticeably more blood on her forehead and two streaks down her chin that suddenly appear. (00:49:10)
Continuity mistake: When Vaughn's assistant puts down the newspaper in front of him, it switches position to the left between shots. (00:38:20)
Character mistake: When Columbo is in Mr Benedict's house with Mr Benedict, he calculates the cost of Mr Benedict's house at $720,000. A moment later Mr Benedict asks Columbo; "How did you arrive with that figure, $750,000?" (00:43:20)
Episode #2.6 - S2-E6
Continuity mistake: When Denton looks up Alex Campbell's vehicle registration, it says "AP08 00G" on the computer screen. When she goes to where the vehicle is, the registration is "AP08 0DG."
The Thing About Heroes - S5-E2
Other mistake: Officer Burgess kicks in a door with a lock and deadbolt and does no damage to the door frame. (00:46:21)