The speech by president Obama at the start of the series is from his address at the Nobel Peace Prize ceremony in 2009.
The surname of character Sigurd Sønsteby, played by Eirik Evjen, is an homage to Gunnar "The Chin" Sønsteby. He was the highest decorated Norwegian resistance fighter during World War II.
The surname of character Håvard Bakkeli, played by Mads Sjøgård Pettersen, is an homage to the Norwegian journalist and author Tom Bakkeli. He has written 3 non-fiction books about the Norwegian military and special forces community.
All of the FSK operators' uniforms and gear is correct. They all wear the same uniforms and gear as the real FSK. And also carry the same weapons. The standard rifle of the norwegian military is the HK416, but the FSK carry the Diemaco C8 SFW, as they do in this show. The standard pistol in the norwegian military is the Glock 17, but the FSK carry the HK USP, as they do in this show. Adella, their translator, carries the HK416 as she is not an FSK operator, she is with the military intelligence service.
Nobel referres to both tbe Nobel peace price and to a character description in Norwegian, a Nobel man, a man of higher moral standards, royal in his behaviour