Just as Briggs arrives to listen to the mission briefing, a splash title informs us "October, 1966." The mission tape then tells Briggs that Rogosh has flight tickets to leave the USA "tomorrow night," so time is short. Later Rogosh tells Briggs he was due to fly out from the USA on November 2nd and the bacteria cultures here timed to be released on November 4th. So, unless Dan's contact date was fortuitously advanced a day but after the message was recorded, it must have been November 1st when Briggs listened to the mission reel and therefore not 'October...' as the splash title said.
During the process of selecting the agents he will use for the mission, the over-the-shoulder shots show the black binder with the usual stack of agents. However, when the close-up of the agent is shown, there is no black binder - Briggs' left hand is just holding the stack of pictures. In fact, when Sonny Allison's picture is shown in close-up, you can see the crease in Briggs' pants at the bottom of the picture.
The gallows platform built in the castle courtyard is only chest height above the ground impossible to snap a man's neck by the drop. We then see the fake "General Klimi" brought out to the gallows marched up a few steps and then the lever is pulled and he drops right through, supposedly to his "death".
When Rogosh examines the contents of his wallet, he takes out some banknotes. Shown is a Hungarian 500 pengo note. The note shown was in circulation for less than one year, from June, 1945, to May, 1946, more than two decades before Rogosh was to believe the event was to have occurred.
Quite often eyeglass lenses, glass cupboard doors and windows are empty to prevent the reflection of bright camera lights back onto the film.
In the war room where team members listen in on Rogosh in his cell and prepare for their interactions with him, the scene outside the window is clearly a painted backdrop.
When Rogosh first wakes up in the cell, he is unable to get up to look out the window without using the bed frame as a ladder. After hearing the construction noises a short time later, he is able to get up to the window with no assistance.
In several scenes, Dan Briggs' mission character "Lopek" quite obviously does not have any lenses in his spectacles.
Rogosh is apparently impossible to break by ordinary methods, but in the end he discloses the location of the last bacteriological device seconds after being simply threatened with death.
Lazloff was detained at the scene of the accident and could not follow the ambulance and therefore could not have found Rogosh in the fake castle.
From Rogosh's point of view, he had been imprisoned for 3 years, yet he thinks nothing of having the same clothes on for three years and they are still in good condition, and no one took the money that was in his pockets.