Matthias Brandt plays the role of "Günter Guillaume", the man who spied out his real life father Willy Brandt. When being asked about his memoirs About the real Guillaume, whom he met in 1973 on a Norway vacation, he said: "I haven't seen a lot of him, I have a weak memory about him. He wasn't a very notable guy"
The real Egon Bahr, who was played by Rudolf Kowalski said that this movie is "dramatically excellent but it doesn't tell the whole truth, as nobody way witnessing it" referring to various Scenes between Willi Brand and Herbert Wehner, which have no records.