Mild-mannered chemist and devoted family man Jeff Carter (Chaney) is exploited by his unscrupulous employer (Naish) until tragedy results.
A half-hour into this programmer and I still wasn't sure where it was going. It plays more like an ordinary melodrama than an entry in a horror series (Universal's Inner Sanctum). Nonetheless, it's the most coherently plotted of the six entries and features Chaney's best performance. He was always good at projecting pathos, unusual for such a hulking figure. Here he gets the opportunity and looks more engaged than usual for the series.
It's a good thing the cast is engaged because the set-up takes some time, enough time for viewers to otherwise wander off. The premise amounts to a cynical look at the pharmaceutical industry, circa 1945. I don't know where the federal Food and Drug Administration was in those days, but the screenplay amounts to a strong case for federal regulation of the drug industry. Not exactly what you'd expect from a horror feature, although there is strong episode of implied horror near the end that works very well.
Anyway, I rather liked this little oddity and enjoyed a young and vigorous Lloyd Bridges clearly on his way up the Hollywood ladder.