Factual error: The episode states that there is border control between Germany and Czechia. There is no border control within the Schengen area of the EU (which includes Germany and Czechia). You can cross borders by car or fly in a plane without showing your ID.
The One Where Jane Visits an Old Friend - S4-E16
Factual error: A newspaper clipping is shown saying a 15 year old boy became the youngest licensed pilot in Connecticut history. It goes on to say he finished his instruction, signed the paperwork, and took off again in a rented plane for his first solo flight. There are many errors here: 1 - The minimum age for even a student pilot's license is 16. For an unpowered glider, it is 14, but such was not the case here. 2 - Further, a student pilot is not a "licensed" pilot. 3 - In order to obtain a private pilot's license, besides all the written tests and practical instruction, the student needs to have completed: 5 hours of solo cross country flying; 1 solo cross country flight of at least 150nm total distance with full stop landings at 3 points; and one segment of at least 50nm between T/O and landings. So he could not have gone on "his first solo flight" after receiving his license. 4 - A new pilot does not have to sign anything. It is the Aviation Examiner that has to sign off the student and give him a temporary license upon satisfactory completion of the private pilot flight test. (00:26:00)
Factual error: The memory Jane has of the man who takes away all her memories holds a butterfly needle to Jane's arm. The butterfly needle is called that because it has 2 wings and a body in the middle. To use this needle properly, the person takes both wings up together to be able to slide the small needle in, but the person we see using it, doesn't do this - he holds the needle behind the 2 wings and then inserts it. Also, this needle is far too small to handle the bag of drug-filled fluid that is intended for Jane's arm.
Sent on Tour - S1-E7
Factual error: When they are flying to Michigan, the scene in the air is of mountains that are definitely not between NYC and Michigan.