Tho Bela Lugosi and Lionel Atwill are the big name draws here, they are in fact only supporting actors within the story. But don't let that detract from this being the entertaining murder mystery spooky house picture it is. Basically we are at a house in the South in the swamp region. It is the home of Kurt Ingston, a recluse who is wheelchair bound. Here on this evening are a number of doctors invited by Ingston, who start to be killed off one by one. So who is responsible? The butler {Lugosi}, the weird housekeeper, the chauffeur, the mentally ill daughter? Or could it have something to do with the mystical Agor Singh who has been teaching Ingston the fabled art of mind over matter? Either way the mystery holds tight throughout and nothing is ever quite as it seems.
For sure it's a Universal Pictures B movie, but it's the kind of effective creeper that gets in and does its job with the minimum of fuss. High on atmosphere and containing a ream of interesting characters, it's acted professionally and finishes on a high. It may not be "And Then There Were None", and those who wish to solve the mystery before the reveal will not find it hard to do so. But this is a decent entry in a lovely sub-genre of horror, so turn off the lights and listen out for those frogs. 6.5/10