This is a typical example of the kind of film that followed a strict formula in the thirties and forties; it was obligatory that there be a 'professor' and/or 'scientist' who was so unworldly and unprepossessing that the wonder was he had ever married in the first place yet in every case he had not only married (his wife was seldom mentioned let alone seen) but sired an equally obligatory attractive/lovely/beautiful daughter, who, in the first reel, contrives to meet the lone private eye or 'hero' figure and introduce him to the 'professor' moments before the 'professor' is murdered by crooks seeking his 'formula'. In a 65 minute movie this usually leaves 60 minutes for the hero to 'solve' the case, often, though not always, coming under suspicion himself. This is probably no better and no worse than lots of others and it does have small roles for Ian Wolfe and Jason Robards Snr.