An unsuccessful sculptor saves a madman named "The Creeper" from drowning. Seeing an opportunity for revenge, he tricks the psycho into murdering his critics.
Hop Harrigan, a top Air Corps pilot, leaves the military and he and his mechanic, Tank Tinker, open up a small charter air service. They are hired to fly an inventor, Dr. Tabor, to his secret laboratory, where he is working on a new and powerful energy machine. However, a mysterious villain named The Chief Pilot is determined to have the new energy machine for his own purposes and kidnaps Dr. Tabor.
Holmes and Watson board a passenger train bound from London to Edinburgh, to guard the Star of Rhodesia, an enormous diamond worth a fortune belonging to an elderly woman of wealth; but within the first hour of the trip, the woman's son is murdered and the diamond stolen and any of the passengers in their car could be the killer thief.
An architect, visiting an English country house, realizes the other guests are familiar from his recurring nightmare. When they share their tales of the supernatural, he is filled with a growing dread.
On a Greek island during the 1912 war, several people are trapped by quarantine for the plague. If that isn't enough worry, one of the people—a superstitious old peasant—suspects a young woman of being a vampiric demon.
Artist David Stuart is blinded by a jealous model whose portrait he is painting. His fiance's father generously offers his eyes for a sight restoring operation. There's only one hitch: Stuart has to wait until after the man dies. Not surprisingly, when the benefactor dies a very premature death, suspicion falls on the artist.
An insurance representative is seduced by a dissatisfied housewife into a scheme of insurance fraud and murder that arouses the suspicion of his colleague, a claims investigator.
Stephen Neale is released into WWII England after two years in an asylum, but it doesn't seem so sane outside either. On his way back to London to rejoin civilization, he stumbles across a murderous spy ring and doesn't quite know to whom to turn.
Losing his memories of the last few days, neurologist Dr. Steele is told that his wife has been brutally murdered. Steele, aware of his conniving wife's infidelity, believes he may have been the killer and enlists the aid of his pretty nurse Stella to hypnotize him into recovering his lost memories.