Holmes takes a vacation and visits his old friend Sir Henry Baskerville. His vacation ends when he suddenly finds himself in the middle of a double-murder mystery. Now he's got to find Professor Moriarty and the horse Silver Blaze before the great cup final horse race.

Holmes, retired to Sussex, is drawn into a last case when his arch enemy Moriarty arranges with an American gang to kill one John Douglas, a country gentleman with a mysterious past. Holmes' methods baffle Watson and Lestrade, but his results astonish them. In a long flashback, the victim's wife tells the story of the sinister Vermissa Valley.

In London a young lady meets a homeless and apparently penniless Russian prince. She introduces him to her middle-class Fulham family and he moves in. It turns out he still has a number of diamonds given him by the last czar, and he is persuaded to start selling them. The resulting money, and his princely notoriety, soon cause changes in everyone's lives.

'Colonel thinks he has killed superior while hunting ghost.' (British Film Catalogue)

'An American visitor to England is frustrated by the restrictions placed upon him and his social life by the Defence of the Realm Act.' (National Film Archive Catalogue)

Twenty years removed from Alice Barlow's murder by a thief looking for her jewels, newlyweds Paul and Bella Mallen move into the very house where the crime was committed. Retired detective B.G. Rough, who worked on the Barlow case, is still in the area and grows suspicious of Paul, who he feels bears a striking resemblance to one of Barlow's relatives. Rough must find the truth before the killer can strike again and reclaim his bounty.

Grace Milroy loses her job working at a factory. However, through a strange set of circumstances, she is taken on as housekeeper at the nearby Swinford Castle the home of the eccentric Duchess of Swinford.

A man ignores a warning to stay away from a sinister house on marshland near Liverpool; when someone drowns close by, he finds the evidence doesn’t add up…

Paul, artistically-inclined son of an American millionaire, moves to Paris where he can find inspiration and study the masters. While there, he finds inspiration of a different sort in the form of the beautiful Jacqueline.

Old Mother Riley does the laundry for the dancers in the pantomime "Aladdin", where her daughter Kitty works as a chorus girl. Sneaking a peek at the show one day, Mother Riley accidentally pops up through a trap door onto the stage. Accosted by the angry star, Mother Riley’s belligerent responses have the audience in stitches. Outraged, the star walks out, leaving Kitty to take over the leading role, to great success.