Goofs

Near the end of the movie, Erik helps the queen when she exits the car in front of the palace. In the close up shot he stands much closer to the queen compared to the overhead shot that follows directly after that.

As Erik tries to kill Van der Zanden, Van der Zanden spots him approaching through the side mirror of his car. Between the mirroring image and the front shot of Erik approaching, the hand in his jacket switches from left to right.

After the first failed attempt to flee to England where John is captured, Erik meets with Guus and asks Guus to hide him. In the background, Dutch fascists are selling newspapers and shouting, "Russian Front Collapses." Later John is executed and a subtitle tells us the date is April 10, 1941. Germany did not invade Russia until June, 1941 so there was no "Russian Front" before then.

It is correct that Dutch squadrons where not equipped with Moquito airplanes but not every Dutch pilot was flying with a Dutch squadron. Some of them flew with regular RAF squadrons. Erik Hazelhof Roelfzema (played by Rutger Hauer) actually flew Mosquito's for a RAF squadron.

The tanks which appear in the Russian scene (1943 or 1944) are Leopard tanks of the Dutch army, first built in 1965.

When Guus goes to Holland for the first time to instruct the resistance group, he is walking in the street with his transmitter in a trunk and in the street he passes a window which displays a poster which says "staking brengt alleen ellende over uw eigen volk". This instruction (which Guus gives) in the movie takes place in 1942, but this poster wasn't issued by the Germans before the winter 1944-1945 as it refers to the great train strike in the winter of 44-45.

When the Mosquito taxies out to bomb Germany it goes past a 1950s Avro Shackleton MR3 long-range maritime patrol aircraft.

When the Germans interrupt the pick-up with the water plane they fire with several weapons including an MG42. This action took place somewhere at the end of 1940 or in 1941. The MG42 was first produced in 1942.

The harbor minesweepers have post-war NATO registration numbers.

Erik's eyesight is so poor that he is unable to hit targets immediately in front of him with an automatic weapon, yet shortly afterward, while being interviewed by the queen, he is able to spot the lovemaking couple through the small window at a much, much greater distance.