soviet union   based on novel   cia   london england   morse code   washington d.c.   cia operative   u.s. military   false alarm   u.s. navy   defection   cold war era   nuclear submarine   reference to christopher columbus   reference to ludwig van beethoven   soviet navy   bearded man   american submarine   chief medical officer   conning tower   intelligence analyst   laurentian abyss   leningrad russia   murder disguised as an accident   national security advisor   reference to luciano pavarotti   reference to paganini   soviet ambassador   soviet defector   soviet military   soviet national anthem   soviet submarine   stealth technology   submarine captain   submarine crew   submarine launched ballistic missile   submarine movie   submersible cruiser   military leadership   atlantic ocean   fictional war   submarine   race against time   20th century   political thriller   suspense   sabotage