Factual error: The airline boarding pass from Melbourne, Australia to Zurich shows the code MLB, instead of the correct code MEL. The code MLB is for Melbourne Orlando International Airport in Florida. (00:58:40)
Other mistake: The doctor is supposedly being led away in handcuffs, but isn't handcuffed when an explosion goes off behind them and they are thrown to the ground. (00:37:30)
Continuity mistake: The clock in the hotel initially reads 9:21 and then abruptly changes to 9:20. (00:19:48)
Factual error: Truro, Nova Scotia is not on the shoreline of Nova Scotia, but is in the middle of the peninsula.
Alexander Kirk: Conclusion - S3-E23
Continuity mistake: When Tom Keen returns from shopping to find someone over the cot of baby Agnus, a fight breaks out, during which the camera jumps to different shots of the baby who is wrapped in a pink blanket, then no blanket, then back to wrapped in the blanket. (00:37:22 - 00:37:58)
Factual error: The grave stone in the cemetery shows the deceased rank as 1st Lieutenant, but the branch of service is U.S. Navy. There is no such rank in the Navy. The rank for an officer 02 is Lieutenant Junior Grade - Lt.Jg.
Character mistake: After the seaplane crash lands off the coast of Havana, Elizabeth radios a mayday. However, she broadcasts nonsensical coordinates. The first set she provides is 23°52' north, the second set 82°49' south. These combined coordinates can't possibly plot to any location on earth. The more probable coordinates should've been 23°52' north, 82°49' west. These coordinates would put the plane roughly 57 miles NNW of Havana, Cuba. (00:05:48)
The Architect (No. 107) - S4-E14
Revealing mistake: Aram Mojtabai fires a high-caliber weapon, destroying a vehicle with it. But after the weapon is fired, the projectile is still in it. Instead, the weapon's lower jaw has disappeared. (00:34:35)
Marvin Gerard (No. 80) - S3-E2
Revealing mistake: In the scene where Solomon kills the Russian convoy driver in the hospital, there is a black computer mouse pointer visible over the HR/min on the medical equipment display. (00:22:23)
Abraham Stern (No. 100) - S5-E11
Continuity mistake: In the beginning of the episode, Reddington is in a Mercedes S-Class driven by Dembe. This specific car model is mainly used by Reddington in his travels. The car is a 2013 W222 Mercedes S-Class. The interior is also depictive of the specific model W222. Suddenly, he gets into a car accident where the Mercedes he is in is not a W222 but a W221, an older model from 2006 to 2013. (00:00:08 - 01:10:00)
Helen Maghi (No. 172) - S9-E16
Factual error: Harold tells Raymond he'll repay the bail money, but given he's pleading guilty and fully intends to go along with required court appearances, etc, the bail money paid will be refunded - it's not like Raymond is out-of-pocket.
Revealing mistake: Aram "hacks" an employee database via a company website - the code that's briefly visible on screen (slo-mo helps but isn't required) is just standard HTML that lays out a web page, not server commands.
Revealing mistake: In scene where Liz is telling captive ex-husband, Tom, that she will let him go after he helps her get Berlin, Tom gets up and you can see the chain on his leg is only held to the floor with a chain link that just screws closed.
Factual error: When they cut to "Dresden, Germany" on the picture that is Budapest, Hungary. The bridge on the picture is the Chain Bridge. The camera is on the Pest side. (00:15:30)
Revealing mistake: When Elizabeth Keen removes the tape from Amalia's mouth after rescuing her, she briefly reveals the sticky side of the tape to the audience, showing another large swatch of tape attached to what should be the sticky side. This was done to prevent the actor's skin and provide easier removal.
Dr. Laken Perillos (No. 70) - S8-E10
Continuity mistake: At the start, Reddington and Dembe are talking to a garageman. He has a protective helmet on him. They zoom in and out of him, and show him from side and front. The strap on his helmet is different every time. One time it's over his ears, one time fully above it, and the next is sits low on his ear. All this within a short minute-long talk.
Factual error: Norfolk Naval Base is located on completely flat terrain and the areas around the base is devoid of trees in all directions for miles. The scene shows the ship with a tree-filled hillside across the water. Obviously the scene was not shot in Norfolk, VA. (00:32:08)
Mako Tanida - S1-E16
Continuity mistake: After Mako Tanida gets Agent Raim, the camera shows his pant leg with a visible tear in it exactly where Tanida later cuts it with his blade. (00:01:27 - 00:02:15)
Dr. James Covington (No. 89) - S2-E3
Factual error: The doctor at the start asks for 0.05 of lorazepam. This dose doesn't make sense - a normal dose might be somewhere from 0.5-4mg. (00:00:30)
Louis T. Steinhil (No. 27) - S7-E1
Factual error: In the beginning a woman is counting brown 200 Euro banknotes. 200 Euro notes are yellow.