Corrected entry: When Leonardo meets with Queenan, it's at 344 Wash. However, when one of Costello's guys calls Leonardo, he says the rat is at 314 Wash.
Corrected entry: When Costello's hooligans drive away from 344 Wash after the shoot-out, Queenan's body on the ground is quite obviously a dummy.
Corrected entry: When the psychologist is looking at Sullivan's mail in their apartment, the envelope from Costigan has Sullivan's address listed at 20 Pickering St, Boston, MA 02459 Apt. 711. In Boston there is a Pickering Ave, not Street and there are no 7th floor apartments. All the buildings on the street are multi-family houses no more than 3 floors. It also has Costigan's address listed at 13 Conant St. Boston, MA. There is no Conant St. in Boston.
Corrected entry: After Will leaves the girl's office with the "two pills" she sighs very deeply but her mouth says "f***"
Corrected entry: The close up shot of Costigan's phone reads "restricted" in the scene where Sullivan calls Costigan using Queenan's bloody cell phone. Costigan then calls back, saying, "you called me on a dead man's phone!" Amazing how he knew the call came from Queenan's cell based on a restricted number.
Corrected entry: How does the man who shoots Costigan at the end of the film know he is there? Costigan says he only called the cop he knew he could trust, and Sullivan is suprised to see him at the end, so how did he know what was going on?
Corrected entry: In the opening scenes, of the execution on the beach, it cuts to the woman lying there. Before the cut French has a gun in his left hand, then after he has an axe in his right hand as well. (00:04:10)
Corrected entry: In one scene, Madolyn enters the apartment carrying a bag of groceries. She asks Matt Damon if he wants "a French doughnut". When he accepts, she hands him what appears to be a cinnamon roll which he almost immediately sets down. In subsequent shots during this sequence, a plate is visible on the countertop one which can be seen what appear to be some pieces of bread or the like, but no cinnamon roll and definitely not a French doughnut.
Corrected entry: When Costigan is beating up the Providence goons, he is hitting the one in the cooler with his right hand. In the next shot he is hitting with his left.
Corrected entry: In the scene where Nicholson "hits" DiCaprio's cast with a shoe, he never really hits it. Watch closely, and you'll see him hit the pool table instead each time.
Corrected entry: How does the man who shoots Costigan when he gets out of the lift know he is there? Costigan only told two men where he was going; Sullivan and his friend from the academy. Sullivan told no one, as we see he is suprised when the man shows up. I know the man says he is a mole within the force, but that doesn't make him telepathic. Only three men knew about the meeting: how did he magically find out about it?
Corrected entry: When Costigan is exiting the lift with Sullivan he is shot, but how did the man who shot him know he was there? Costigan only told his friend from the police academy, and Sullivan obviously didn't know the killer since he was suprised to see him and knew nothing about any other moles in the police force. This isn't to be confused with Mark Wahlberg's character shooting Sullivan at the end of the film.
Corrected entry: In the scene where Costello confronts Costigan about being the rat in the bar and Costello has walked away and come back for his cigarette, an unlit cigarette magically appears in Costigan's mouth between shots.
Corrected entry: During the first meeting of Billy(DiCaprio) and Madolyn (Farmiga) in her office, the computer behind her initially shows a McAfee update notification in the bottom right hand corner. And the camera flicks between the two of them it disappears mid-scene, yet reappears again towards the end.
Corrected entry: In the scene near the start of film where you see Matt Damon playing rugby, he is seen pushing in the scrum. He is playing in the flanker position. This would mean that he would need the number 6 or 7 on his back. However, when he is walking off the pitch he has the number 10 on his back which would mean he would be playing fly-half.
Corrected entry: In the final scene after Matt Damon gets shot and falls to the floor and Mark Wahlberg walks out of the room, the camera shows Matt Damon lying in a pool of blood. A second later the camera cuts to a different angle of the body lying on the floor and it is no longer Matt Damon. It is a different actor with darker hair, darker eyebrows and wearing different clothes. (02:24:05)
Corrected entry: When Costigan leaves the adult theater and follows Sullivan to get an ID, his phone rings in the alley and this lets Sullivan know he is being followed. This seems convenient to the plot, seeing as how Costigan's phone was just on vibrate in the theater. (01:24:45)