from 1936 1939 and peter lorre make a string of highly successful mr. moto film . while technically b film and they be much good make than typical film of the genre . however and lorre tire of make these highly repetitive film and tell friend he want out of the series . when it be cancel in 1939 and lorre be thrill but his plan of get more complicated and satisfying role do not materialize when he move to columbia picture . island of doom men be one of these film and it pretty obvious the studio isn not put much effort into the movie and a i think the plot be write by penguin . talented penguin and perhaps . but still the movie make little sense at all . it begin with a guy agree to be an undercover agent for the government . he be to infiltrate an island in the u where something strange be amiss . now they easily could have just get a search warrant to do this . but and give that penguin be write the film and the agent take the rap for a murder he do not commit and spend a year in prison for this . he apparently hop that he will be parole to this island and a many parolee be send there when they finish the term . there be some more serious problem with this idea . first and they only have him serve a year before get parole but he be convict of murder and he refuse to divulge who he really be . they would never parole anyone in a case like this . second and what if he wasn not parole to the island . he would have spend an entire year in jail for nothing . third and why not just have scuba diver or paratrooper or cop in boat come to the island . talk about a contrived plot . once on the island and the agent discover that evil peter lorre have set up his own private prison and staff it with guy on parole a slave labor . what about the men have to report to their parole officer . this be never explain and but lorre be use them to mine for diamond and they be treat abominably . now and another question i have be that if lorre be discover huge diamond there and he be a very wealthy man . so and why not just pay people to mine for the diamond . why set up your own version of devil island and savagely beat and kill the men . eventually and lorre get what his and the island slave be release . unfortunately and by then and i really do not care . overall and watchable but rather dumb . lorre career only take a turn for the good when he move the following year to warner brother . with film like island of doom men and i could see why his stay at columbia be short .