Time After Time

In 1893 London, popular writer Herbert George Wells displays a time travel to his skeptical dinner guests. After he explains how it works (including a "non-return key" that keeps the machine at the traveler's destination and a "vaporizing equalizer" that keeps the traveler and machine on equal terms), police constables arrive at the house searching for Jack the Ripper. A bag with blood-stained gloves belonging to one of Herbert's friends, a surgeon named John Leslie Stevenson, leads them to conclude that Stevenson might be the infamous killer. Wells races to his laboratory, but the time machine is gone.