this film be suppose to be a fictionalised account of the ultimately unsuccessful british underwater raid on that mighty german battleship and the tirpitz . all i can say on it be the acting be absurdly stag and the script be about a hackneyed and unbelievable a they get and and the characterisation be terribly shallow and stereotypical while as well it be wildly historically inaccurate even allow for the inevitable artistic licence take in make film on historical subject . all in all and it be hard to believe that this flick be make in the late 60 ( 1968 ) and i agree with another contributor here that it seem to be the sort of film that they make twenty five year earlier and i. e. actually during the war . some twenty three year after the end of the second world war and submarine x 1 be still ludicrously and woodenly propagandist . even the action be unbelievable with german paratrooper raid on the naval base etc . i realise that it be only a war movie and doubtlessly make for a young male view audience and and it be silly to take such film seriously and and i do not while however and submarine x 1 even a a time killer for boy on rainy weekend afternoon be orrible . fortunately for the view public and james caan and who be a really excellent actor and go on to much big and good thing straight after submarine x 1. who could ever forget his stellar and though uncredited and performance in 1969 a rupert of rathskeller in the to sire with love episode of get smart . brilliant . and from there on his career really forge ahead .