what make this one very interesting to me be that it hard to categorize . in fact most of lewton film be ( it a shame he die so young ) . even though lewton be a mere producer he co write this one along with the two other karloff film . the writing be where these lewton film excel . this one start off a a war movie and then move to what appear a a horror film when they land on the island ( an island cemetery not too hard to imagine for greece ) . then it become a psychological mystery follow closely by what seem to be a vampire movie but then it change to what appear to be a faith v science story . finally and it become full fledge horror but surprisingly it non fantastical . the movie be firmly base on the real world . it keep change gear so that you never know what to expect some viewer will be put off by this since it doesn not follow the rule of the majority of film . the drama be not overly excite until we approach the end everything be very low key and again some viewer may not appreciate this . karloff give a good performance no one else stand out really but the writing be excellent and the actor be prop up by it . finally and i have to say that some of the scene in the vault be very creepy even by modern standard remind me of some of david lynch film .