▁Navy ▁Y ard ▁at ▁Port sm outh . ▁The ▁train ▁is ▁stopped ▁as ▁soon ▁as ▁possible ▁in ▁case ▁an ▁explos ion ▁is ▁im min ent , ▁but ▁a ▁resident ial ▁area ▁is ▁nearby ▁and ▁the ▁police ▁have ▁to ▁ev acu ate ▁local ▁residents . ▁ ▁The ▁local ▁authorities ▁get ▁in ▁contact ▁with ▁former ▁World ▁War ▁Two ▁Royal ▁Canadian ▁Engine ers ▁bomb ▁dispos al ▁Major ▁Peter ▁L ync ort ▁( G l enn ▁Ford ), ▁who ▁is ▁living ▁in ▁the ▁city ▁with ▁his ▁Paris ian ▁French ▁wife ▁Jan ine ▁( An ne ▁Vern on ) ▁and ▁working ▁for ▁Ang lo - Can ad ian ▁Machine ▁Tool ▁Co ., ▁Ltd . ▁L ync ort ▁agre es ▁to ▁help , ▁when ▁the ▁city ' s ▁Railway ▁Police ▁security ▁chief ▁Jim ▁W arr il ow ▁( M aur ice ▁Den ham ) ▁vis its . ▁Jan ine ▁L ync ort ▁is ▁not ▁there , ▁as ▁she ▁had ▁walked ▁out ▁on ▁him ▁after ▁their ▁t enth ▁fight ▁in ▁just ▁one ▁month . ▁ ▁L ync ort ▁begins ▁opening ▁the ▁train load ▁of ▁mines ▁one ▁by ▁one . ▁They ▁are ▁h ollow ▁and ▁a ▁small ▁explos ive ▁charge ▁hidden ▁inside ▁any ▁one ▁could ▁expl ode ▁the ▁whole ▁train . ▁The ▁work ▁is ▁slow ▁as ▁well ▁as ▁dangerous , ▁and ▁War il ow ▁joins ▁in ▁as ▁L ync ort ' s ▁assistant . ▁They ▁find ▁an ▁explos ive ▁charge ▁and ▁L ync ort ▁dis ar ms ▁it . ▁ ▁Meanwhile , ▁the ▁police ▁plan ▁to ▁catch ▁the ▁sab ote ur