Factual error: Throughout the season, it is the BND who run security investigations within Germany. The BND is the German external intelligence service. The internal security service, who would actually be running these investigations, is the BfV. Neither service has a power of arrest, which BND agents exercise on at least two occasions during the season. If they need to arrest somebody then they must call in the Bundespolizei (as they do correctly at other times).
Factual error: Almost anytime where an ipv4 address is shown it contains one or more digit exceeding 255, impossible given the limits of the technology. eg: 257.100.23.59, 23.274 .44.67, and even 316.105.147.373. (00:04:55)
Super Powers - S5-E3
Factual error: Carrie loads a rifle with at least a 7mm Remington, possibly a .30-06 Springfield bullet. She shoots Quinn in the back one time, and he falls, only to disappear and reappear where he chokes Carrie from behind. He later removes his jacket to reveal he's wearing a soft armour bullet proof vest. The armour he wore was maximum level 3A vest which will only stop handgun threats. He would require a plate carrier with SAPI/ESAPI ceramic plates to stop such a threat. (00:55:37 - 00:57:10)
Why Is This Night Different? - S5-E4
Factual error: The cars on the airstrip have Swiss plates starting with RF. No canton uses these letters, nor the shield depicted on the plates. (00:19:20 - 00:20:55)
Why Is This Night Different? - S5-E4
Factual error: The airport is shown as Douvaine in Switzerland. Douvaine is actually in France.
Factual error: Before Jonas discovers Quinn is gone, he calls the emergency number, which is 112. However, the lady on the phone says "zwei eins eins" (211).
Other mistake: Carrie took Finn back to hospital and after he left the car he lifted his left arm up and brushed back his hair. I thought he couldn't move his left arm?
Casus Belli - S6-E5
Plot hole: Later in the evening, after NYPD takes Quinn into custody, Carrie finds his cell phone, with pictures showing their home had been spied upon from across the street, as well as other evidence of a conspiracy. He had tried to hand her the phone right after the police broke in, but it was knocked from his hand and she discovered it under the smashed door. In the real world, Carrie's home would have been considered a crime scene and the police would have searched it thoroughly, top to bottom, undoubtedly finding the phone themselves, but are shown driving away after the confrontation.
Factual error: Filming location is Budapest instead of Moscow, you see HU license plates on cars, HU street name tags, and even the flag of HU and the EU waving over the building Carrie is on.
Factual error: The President's casket is being brought into hanger at Dover AFB Delaware. There are no mountains in Delaware as was seen in the background.
Factual error: At the beginning of the last sequence a city centre is shown with the caption "Moscow." In fact, the city shown is Budapest, with the Danube, Castle, St Matthias Church, Fisherman's Bastion and Chain Bridge visible.
Chosen answer: Everyone else calls him Brody or Sgt. Brody, and it probably became habit to her.
The_Iceman
Can't get the source but I read that even the Producer responded to that. Stating that it was common practise for a military wife living in a military complex as everybody refers to their husband by their last name.