The black room the man they could not hang

"The black room: Murder and betrayal have darkened the once noble house of Berghman. Count Gregor is a degenerate killer who lures innocent victims into the castle's chamber of horrors. According to prophecy, Gregor is to be murdered by his brother. When his brother is summoned to the castle, they become locked in a terrifying struggle to the death."@en
"The man they could not hang: In the first of his celebrated "Mad Doctor" series, Karloff is Dr. Savaard, a scientist who has perfected a device to revive the dead, which comes in handy when he's wrongfully arrested for murder and hanged. Resuscitated by his loyal assistant, he now heads out to seek vengeance on those who condemned him and his remarkable discovery."@en