Dedication - S1-E15
Continuity mistake: At the start, Frank isn't wearing glasses at the table. Then in one shot he is. Then not again. (00:00:40)
Continuity mistake: During the stakeout of the apartment building, in the exterior shots of the Clyde Motorcycles shop, Danny is peeking out through a ripped paper opening within the letter "D" in Clyde. However, in the interior shots the black tape letters of the word Clyde differs. The paper is ripped between the two letters "D" and "E" and that space within the "D" is blocked with molding, making what is in the exterior shots quite impossible. (00:15:40)
Continuity mistake: At The End of the episode, a screen shot of Nicki occurs. A day or so earlier, she had been kidnapped and pistol whipped across the face. But this screen shot shows no bruises or swelling or anything, despite being hit so hard she fell over in a chair just a day or so before. (00:40:00)
Nightmares - S3-E7
Continuity mistake: In the very first episode Frank Reagan is getting dressed to go to Jamie's graduation ceremony. He slips on his watch and then takes a ring with a blue stone (looks sort of like a class ring) and puts it on. It is definitely and obviously a large blue stone. Then in this episode, near The End, when Frank is sitting at the bar talking to Garrett, as Frank lifts his drink in his right hand, and Garrett says "Thank you, Frank", that "class ring" has a very definite and obviously large red stone. (00:01:20 - 00:40:50)
Continuity mistake: Near The End of the episode, just after Danny's family is looking at the Statue of Liberty, Danny puts his arm around Linda, and then does it a second time.
The City That Never Sleeps - S4-E2
Continuity mistake: Danny and his partner are driving with a passenger in the back seat. You can see both front seat headrests removed while they are talking in the car. Next shot shows the car from outside and you can see the headrests are on the seats.
Continuity mistake: Jamie's car is suddenly yellow when offering driving lessons. In previous episodes, the car is blue. (00:40:18 - 00:41:16)
In and Out - S7-E14
Continuity mistake: At the start, the rearview mirror on the windshield of Eddie and Jamie's squad car disappears and reappears.
Continuity mistake: Jenko and Witten confront a guy creating a commotion in a market. The felon runs past them out to the sidewalk where, somehow, the two cops are waiting and grab him.
Continuity mistake: When Danny and Jimmy drive up to D'Angelo, the rearview mirror appears, disappears, and reappears on the windshield (though its small square adhesive is intact). (00:28:30)
Continuity mistake: As the couple with their two children are walking down the street, the daughter, Sophie, is holding latex helium balloons which are the transparent type, but after she and her mother are struck by the reckless drunk driver, when the balloons float away they are the opaque type. (00:04:25)
Continuity mistake: During the family dinner, while everyone discusses the use of body cameras Frank is wearing his eyeglasses, but in the shots facing Linda during the conversation Frank's eyeglasses are gone. (00:21:40)
Continuity mistake: In the first two shots of the family dinner Henry is holding his fork up in his left hand, but in the third shot from behind him (facing the family) his raised left hand is empty with his fork lying across the plate, then it's back up in his hand in the fourth shot. (00:21:10)
Continuity mistake: When Frank goes to see Gallo at the hospital after the lawyer's arraignment, Frank drops a deck of cards on the bedside table beside the bottle of whiskey, but the bottle has vanished in the next shot. (00:41:00)
Continuity mistake: At the start of the episode, when Frank opens/closes the refrigerator door we see the door's layout, and the door bin cover is under the top shelf compartment. As he makes himself the sandwich Erin and Nicky walk in, and when Nicky opens the fridge door it's an entirely different interior style with the door bin cover at the top.
Continuity mistake: During the courtroom hostage scenes, when Raoul Delgado and Erin are on the phone with Danny there are some closeups of the gun Delgado is holding. After Delgado hangs up on Danny, when he slams the gun into Jack's temple and orders Erin to go with him, in these closeups the gun is noticeably different. (00:30:55)
Continuity mistake: After Danny shoots Delgado, he kneels down and holds Erin at her right side with his back facing the car (driver's door is open), but in the next shot Danny is kneeling at Erin's left side with his front now facing the car, as seen in the live feed Frank is watching on the monitor. The live feed is not backwards, note the open driver's door, etc. (00:34:35)
Dedication - S1-E15
Continuity mistake: When Danny gets into gunfight with Rory Brennan at Whitey's facility, keep a good eye on Rory's gun. After Danny shoots him, the gun drops out of his hand onto the ground between his legs. When Danny goes down the staircase, the gun is back in Brennan's hand, so Danny uses his foot to bring the gun to the floor...for the 2nd time. (00:29:50 - 00:30:35)
Continuity mistake: Danny drives up to the police station. Erin is waiting for him, leaning on the trunk of a police car. A different camera angle shows her standing up. Next shot she is leaning against the car again, then next shot she is standing.
Continuity mistake: Frank and Henry are up late, 3am, and, talking about how his late wife Mary never wanted to see her youngest go into the Family Business. Henry says how proud Mary was in the day of Jamie's graduation. But Mary was already dead by the pilot, when Jamie graduated.
Suggested correction: The graduation Frank and Henry are talking about is Jamie's graduation from Harvard, not from the police academy.