Other mistake: Elizabeth picks up a stuffed bunny which supposedly was from her childhood. The bunny has burns on it after being in a fire. You can see 2 plastic tag fasteners attached to the bunny, which wouldn't have survived the fire.
Suggested correction: Later we see in the flashback that Liz was holding the bunny. It only got singed as she was escaping. It wasn't "in" the fire.
Other mistake: The license plate of the car used by Platt (93N-LI62) is the same as the one used by Charlotte Patterson in episode 13 (season 1): The Cyprus Agency. (00:01:10)
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)
Other mistake: When Paul goes into the bank he's carrying the money bag. When he is seen walking into the bathroom for the first time, he isn't carrying the bag, which is already on the windowsill.
Lord Baltimore (No. 104) - S2-E1
Other mistake: When Rowan shoots the suited men with the sniper rifle, the camera angle shows members of the public watching the filming and filming the the production on their phones. (00:28:46)
Leonard Caul (No. 62) - S2-E19
Other mistake: When Reddington is close to death and is saved by a lung/heart operation in his field hospital, minutes after the operation the site is attacked and Red is left trying to defend himself from gunmen. Not only does he find the strength to pull out all the monitor wires and lines attached to him, but when he goes into the corridor to get a gun, he is fully dressed in jacket and trousers (pants). Did the very efficient hospital team forget to bring a hospital gown for him to wear? Did they operate on him while he was wearing his street clothes?
Mr. Gregory Devry (No. 95) - S3-E11
Other mistake: After arresting the Reddington impostor, Ressler states that while hunting Red they had only one photo with a "passing resemblance to the man we've been working with." In S1E1 you can however see a high quality picture of Red on the front desk screen while he is arrested. (00:32:25)
Suggested correction: The photo that's seen on the front desk screen is the same photo on Reddington's wanted poster, which has been seen a number of times in the show. That is the 1 photo the FBI have that has a "passing resemblance" to Reddington today, which is what Ressler is referring to.
Other mistake: It shows an eagle-eye view of the downed plane with the pontoons floating separate from the plane; the plane starts to sink more and Agent Keen incorrectly says that one of the pontoons is taking on more water, even though they aren't attached to the plane and keeping it afloat anymore. (00:05:55)