An investigator from the War Crimes Commission travels to Connecticut to find an infamous Nazi, who may be hiding out in a small town in the guise of a distinguished professor engaged to the Supreme Court Justice’s daughter.
A convicted thief in Dartmoor prison hides the location of the stolen Bank of England printing plates inside three music boxes. When the innocent purchasers of the boxes start to be murdered, Holmes and Watson investigate.
An unscrupulous private investigator with a penchant for blackmail is found dead in a car and the leading suspect is Janet Bradley, the daughter of a mayoral candidate. With the election just weeks away, shady and ruthless individuals muscle the medical officer into switching the corpse with another body. Lieutenant Sam Carson, one of the few good apples in the bunch must find a way to get to the bottom of it all.
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.
When beautiful Mary returns to her "whistle stop" hometown, long-standing feelings of animosity between two of her old boyfriends leads to robbery and murder.
Cashier and part-time starving artist Christopher Cross is absolutely smitten with the beautiful Kitty March. Kitty plays along, but she's really only interested in Johnny, a two-bit crook. When Kitty and Johnny find out that art dealers are interested in Chris's work, they con him into letting Kitty take credit for the paintings. Cross allows it because he is in love with Kitty, but his love will only let her get away with so much.
An unemployed drifter, Eric Stanton wanders into a small California town and begins hanging around the local diner. While Eric falls for the lovely waitress Stella, he also begins romancing a quiet and well-to-do woman named June Mills. Since Stella isn't interested in Eric unless he has money, the lovelorn guy comes up with a scheme to win her over, and it involves June. Before long, murder works its way into this passionate love triangle.
Ten strangers are summoned to a remote island and while they are waiting for the mysterious host to appear, a recording levels serious accusations at each of the guests. Soon they start being murdered, one by one. As the survivors try to keep their wits, they reach a disturbing conclusion: one of them must be the killer.
After the King of Rovenia has been assassinated, Holmes and Watson are engaged to escort his son to Europe via Algiers, aboard a transatlantic ocean liner which also carries a number of suspicious persons, any of whom may be involved in a plot to also assassinate him.
Sherlock Holmes investigates when young women around London turn up murdered, each with a finger severed. Scotland Yard suspects a madman, but Holmes believes the killings to be part of a diabolical plot.
The famous Borgia Pearl, a valuable gem with a history of bringing murder and misfortune to its owner since the days of the Borgias, is brought to London, thanks in part to Sherlock Holmes. But before long the jewel is stolen, due to an error on Holmes' part, and shortly thereafter, a series of horrible murders begin, the murderer leaving his victims with their spines snapped and surrounded by a mass of smashed china.