Night Key

A deaf inventor, Dr. Thorne, creates a device that can render any lock useless. Unfortunately, a ruthless gang of criminals learns about his invention and forces him to use it for their nefarious purposes. Thorne must find a way to outsmart the criminals and reclaim his invention before they commit a major heist.

Night Key is a minor, yet engaging, B-movie thriller from the 1930s, notable for its early exploration of lock-picking technology and a typically menacing performance from Boris Karloff. While not a critical darling, it offered a tense, fast-paced experience for audiences seeking a straightforward crime drama.

• Praiseworthy for its inventive premise and Karloff's compelling presence.

• A briskly paced, if somewhat predictable, crime thriller.

• Appreciated for its atmospheric tension and straightforward plot.

Google audience: Audience reception is difficult to gauge due to the film's age and limited availability, but it is generally seen as a solid, if unexceptional, entry in the crime-thriller genre of its era, with many appreciating Karloff's performance.

The film's plot revolves around a fictional device that could open any lock, foreshadowing later advancements in security technology and locksmithing tools, albeit in a highly dramatized manner.