The Hunt for Red October (1990) Review
When a renegade Russian submarine captain (Sean Connery) disappears into the North Atlantic with Russia's latest technical marvel, it is at first assumed that he intends to start a war. That is, after all, what the Red Octoberwas designed to do. But at least one person, Jack Ryan (Alec Baldwin), believes differently.
He has studied Marko Ramius, and he has even met him once before, and he doesn't think that he would do something like that. In fact, Jack thinks that he's trying to defect. There are just two problems with that. First, anyone with a multi-billion dollar war machine may do just about anything that they want. And second, this machine just happens to have a super-secret caterpillar drive that means they can't be tracked in any traditional way, so finding him is another thing entirely.