"I shall kill you tomorrow night."
Description: Claude Rains as scientist Jack Griffin theatens Dr. Arthur Kemp (William Harrigan) in science fiction motion picture The Invisible Man (1933).
Jack Griffin is a research scientist who discovers an invisibility formula. But there is a problem: one of the chemcals used in the formula (Monocane) is known to cause insanity.
Over time, with further exposure to the chemical, Griffin goes mad with megalo-maniacal tendencies of world domination.
“The drugs I took seemed to light up my brain. Soon I realized that power I hold—the power to rule...Power to walk into the gold vaults of the nations...into the secrets of kings...into the holy of holies. Power makes multitudes run screaming in terror at the touch of my little invisible finger. Even the moon’s frightened of me—frightened to death; the whole world is frightened to death...We’ll begin with a reign of terror—a few murders of little men, just to show them that we make no distinctions. We might even wreck a train or two—just these fingers round a signalman’s throat—that’s all.”
One night, Griffin share his plans to his colleague, Kemp. But Kemp realizes that Griffin has gone mad and plans to betray him to the police. Griffin escapes and enters Kemp's home with a message to the man who betrayed him:
“I’ve no time now, but believe me, as surely as the moon will set and the sun will rise, I shall kill you tomorrow night. I shall kill you even if you hide in the deepest cave of the earth. At ten o’clock tomorrow night, I shall kill you.”
To elude Griffin, Kemp dresses as a policeman but Griffin finds him and sends his car off a cliff, where it explodes on impact at it hits the bottom of the gorge.
In the end, Griffin takes refuge in a barn, but the police set it ablaze which chases The Invisible Man out into the snow, where the police follow his footprints and shoot him.
Dying in the hospital, Griffiin admits he should have never tampered with the laws of nature. As he dies, his body gradually sheds its invisibility.
Note: In the film Theatre of Blood (1973) Vincent Price as demented actor Edward Lionheart tells a movie critic, “I’ll kill you when I am ready—next week, next month, perhaps next year! Oh, I am going to make you suffer as you’ve made me suffer!”