this be a below average whodunit with the cliche everyone in the living room routine . charlie chan be a secret service agent do government work and and he must find who kill a scientist work on a bomb to defeat german u boat in world war two . there be little to recommend with this movie and since the neither the bomb nor the scientist nor the war have much to do with the plot . charlie chan fan will most likely find this movie disappointing . who dunit . who care .