The wreckage of the plane that exploded in the previous episode lies at close quarters at the end of the runway. The plane however must have covered a far greater distance in the time depicted between the take-off and the explosion. Furthermore, debris of an airplane that disintegrates in full flight gets scattered over a far greater area.
Alexander is calling an Ambulance for Quinn. You can her an recorded message say: "211 der Notruf...." But the correct number for emergencies in Germany (like in the rest of Europe) is "112"
When Numann plays back the brothel's CCTV footage, he clicks on the date "20 April 2016". This date is in the future, as this was broadcast in November 2015.
When Carrie is at the demonstration in front of the Russian embassy she negotiates the price of a mask with a young guy. She offers 20 EUR but the guy demands 50 EUR. She agrees but then hands over a 20 EUR bill (blue colour). 50 EUR bills are red.
The car of Russian delegate/spy Krupin has a German license plate reading 0-240-11. The leading 0 indicates a car of the diplomatic corps, but the country code 240 has never been issued in Germany. The correct Russian code would be 140.
Allison shows Saul the passenger list of a Lufthansa flight from Berlin to Geneva. There is and was no Lufthansa flight on that route, because Lufthansa only uses Frankfurt and Munich as their bases.