The cook's assistant is a KGB informer. He kills Borodin. Jack Ryan kills the informer. The Red October safely gets to America. Ramius reveals he defected to stop the Soviets using Red October to potentially start a nuclear war.
Factual error: When Jack Ryan is chasing the Cook's Assistant Igor Loginov through the missile compartment, the compartment shown does not exist. Russian Typhoon submarines (of which the Red October is a variant, just with a new propulsion system) have a pair of cylindrical pressure hulls - each containing a missile compartment - on either side of the missile tubes. The location where the fight takes place in the movie would be inside a free-flood area in a real Typhoon.(02:01:20 - 02:05:00)
Trivia: The bear that Jack Ryan brings home to his daughter is the exact same bear Bruce Willis brings to his son in Die Hard (both films were directed by John McTiernan).(02:06:00)
Question: In the sonar room on the Dallas, there is a roll of what looks like toilet paper next to the monitor. Is there some special purpose for that?
Chosen answer: They use it to wipe the grease pencil markings off the screens.
We called it "the Duty Roll."