Best Mystery Movies of 1917

AJ Raffles, a handsome jewel thief masquerades as a gentleman of society fitting in with well-to-do people. He dons a mask and waits for an opportune moment to steal belongings, usually some jewelry and to take advantage of unsuspecting women whether at an estate or aboard a passenger ship. Raffles knows secret passageways to aid his escape from capture such as disappearing into a large grandfather clock that is really a secret doorway. He even eludes capture by jumping off a ship and swimming to shore while women passengers fire pistols at him.

Fishermaid Marcia Manot finds an emerald which once belonged to a Norse queen and is cursed. Greedy American Silas Martin marries her, then sets her up for divorce. She kills him and weds his business manager Sterling, but a detective learns about Silas' death.

Clutching a dagger, a woman enters a room through velvet portiers and murders Nathan, scion of a distinguished family.

Police headquarters has been plagued by a series of robberies, culminating in the theft of a priceless necklace smuggled from Europe. The detectives are on the track of a gang led by master thief Ramon Mordant and his accomplice known as "the Face" because of his twisted and hideous countenance.

A "scientific detective" story about the attempted murder of a wealthy New Yorker in his mountain lodge is framed with a satire of Hollywood as the writer of the story comically tries to get the script read and accepted by a studio.

Louis and August Siever, the twins sons of a German father and American mother, are traveling in Europe when war breaks out. August joins the Kaiser's army, but Louis, a supporter of the United States, is practically made a prisoner in Berlin for a year while he tries to prove his American citizenship. After a violent confrontation with Louis, August steals his brother's passport and leaves for New York with Gerda Anderson, a German spy.