K-19: The Widowmaker

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• The movie set of the sub was identical in size to the actual K-19 sub, thanks to the K-19 blueprints that were available to the producers. Since the sub's corridors were very narrow, the filming camera rolled along a rail system implemented on the ceiling. The rails were painted so they would blend with the sub's interiors.
• Movie Goof (factual errors): The worry that the reactor might explode is flawed. Uranium as used in reactors must contain U-235 and may contain U-238 but the design is wrong to cause an explosion. A critical mass of U-235 or plutonium must be formed almost instantly for an explosion, which can't happen in a reactor.
• Movie Goof (anachronisms): The film shown by the political officer shows the Civil Rights abuses committed in Birmingham in 1964, four year after the K-19 was launched.
• In real life the K-19 was under the command of Capt. 2nd rank Nikolaj Zateev. The position of executive office was held by Capt.-Lt. Vladimir Yenin.