简介：ThestoryoftheunderwaterwarbetweenUS,UKandSovietsubmarinesinthesecondhalfofthe20thcentury. Part1:KnowYourEnemy Fordecades,BritainandAmerica'sColdWarsubmarineswagedasecretwarofespionageagainsttheSovietnavy.Deepintheocean,crewswerelockedinagameofcatandmouseaseachsidebattledtogainthetacticalandtechnologicaladvantage.Afterdecadesofsilence,submarinersfromboththeeastandwestarenowallowedtotalkmoreopenlythaneverbeforeabouthowtheyplottedtowinthewarbeneaththewaves.Thewest'ssuperiortechnologyallowedthemtosecretlyshadowtheSovietfleet,atclosequarters,givingthemvitalintelligenceandtheupperhandifwarbrokeout.Shadowingsubmarineswasdangerous.ThefilmexplorescloseencountersbetweenwesternandSovietforcesthatputthelivesofsubmarinersatrisk.CandidinterviewswithBritish,AmericanandRussiansubmarinersrevealthepressuresoflengthyunderwaterpatrolsthatdrovethemtotheedgeoftheirphysicalandmentallimits. Part2:TheRussiansareComing Throughoutthe1970sand80s,thefrontlineoftheColdWarwashiddenbeneaththeocean.Submarinersfromthreenavies-American,SovietandBritish-playedadeadlygameofcatandmouseinasecretwarofespionageandintimidation.ThenuclearbalancebetweenEastandWestwasconstantlyshifting.Thiswasaconstantstruggletogaintechnologicaladvantage,andtheSovietsdevelopedsubmarinesthatwereevermoresophisticated-bigger,fasterandmoreluxurious-thananydevelopedbytheWest.Forover40yearsthedetailsofthistensestand-offhavebeenacloselyguardedsecret.Nowsubmarinersfromallthreenaviesareabletotalkmoreopenlythaneverbefore.TheyrevealhowtheunderwaterarmsracetookballisticmissilesbeneaththeArcticice,andtheyrememberhowitnearlyendedinnucleardisasteratsea.…