basil rathbone nigel bruce return sherlock holmes dr watson superior tale holmes battling rd reich mastermind genius professor moriarty film opens switzerland holmes disguise old bookseller must bring dr tobel tobel bomb site england germans kidnap tobel holmes succeeds germans recuit evil professor moriarty manages outwit scotland yard lestrad dennis hoey kidnapping tobel clue left tobel list dancing men break hidden code dancing men holmes moriarty first holmes prevent bomb site falling german hands thereby saving england precision bombing techniques developed tobels bomb site watch enjoy