This is the first of Karloff's cycle of "Mad Doctor" B-films for Columbia and, given that somehow I was under the impression that this was considered the least of them, I was surprised to find it great fun throughout. Essentially, all the films had similar plots (and it's interesting to see how the star's looks changed from one title to the next) - with Karloff on the verge of some great discovery or other but who's always thwarted at the proverbial 11th hour by thick-headed police and other figures of authority!; in fact, they're so teeth-grindingly stupid here that Karloff's conversion from dedicated scientist to cold-blooded killer was actually quite convincing!!
The star is in really fine form in this film - especially effective when delivering his threatening final statement before the court passes sentence on him and then, following his resurrection (complete with broken neck a' la Bela Lugosi's Ygor!), when exacting his elaborate and sinister revenge plan. In fact, the second half - intriguingly modeled on Agatha Christie's "Ten Little Indians/And Then There Were None" - is even more entertaining than the first. seeing how it finds all who remain of Karloff's intended victims being locked up in one room of his house (with all exits having been systematically blocked and wired with electricity!) and allowing 15 minutes between one execution and the next. Of course, his plans go sadly awry in the end as he hadn't counted on the presence of his daughter (alerted to Karloff's reappearance by her snooping reporter boyfriend) and, when she eventually 'sacrifices' her life to save that of Karloff's unwilling guests, he sees the error of his ways and willingly accepts death anew from a bullet wound. Unfortunately, there's a hokey, tacked-on happy ending of sorts - with Karloff's daughter getting resurrected in the nick of time, through the use of his own invention, before he himself expires.
The star is in really fine form in this film - especially effective when delivering his threatening final statement before the court passes sentence on him and then, following his resurrection (complete with broken neck a' la Bela Lugosi's Ygor!), when exacting his elaborate and sinister revenge plan. In fact, the second half - intriguingly modeled on Agatha Christie's "Ten Little Indians/And Then There Were None" - is even more entertaining than the first. seeing how it finds all who remain of Karloff's intended victims being locked up in one room of his house (with all exits having been systematically blocked and wired with electricity!) and allowing 15 minutes between one execution and the next. Of course, his plans go sadly awry in the end as he hadn't counted on the presence of his daughter (alerted to Karloff's reappearance by her snooping reporter boyfriend) and, when she eventually 'sacrifices' her life to save that of Karloff's unwilling guests, he sees the error of his ways and willingly accepts death anew from a bullet wound. Unfortunately, there's a hokey, tacked-on happy ending of sorts - with Karloff's daughter getting resurrected in the nick of time, through the use of his own invention, before he himself expires.