| In the Book |
In the Movie |
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Ryan does not leave DC and does not take part in any action. |
Ryan infiltrates a nuclear facility in Ukraine alongside John Clark. |
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Cathy Ryan is a renowned eye surgeon. |
Cathy Ryan is a 2nd-year medical resident.
|
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They are both married. |
Ryan and Cathy believe the other are afraid to commit. |
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Ryan is driven to the US-Soviet hotline from his office in the CIA. |
After his helicopter is knocked down, Ryan steals a truck to head to the US-Russian hotline.
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There is never any discussion of the USSR's nuclear weapons until after the explosion. |
The President is in constant discussion about Russia's nuclear weapons and political stability until after the explosion. |