The Return of Boston Blackie

Margaret has given up her stage career to marry inventor Jerry Benson. Jerry fails to impress oil executive William Graves with his idea, but Margaret has better luck when she catches Graves' attention and she both makes the sale and becomes the object of Graves' obsession. Profits from the invention make the Bensons wealthy; however Graves schemes to steal Margaret from Jerry by swindling them out of their money and getting Broadway floozy Gloria to break up their marriage.

Alita, a child who has been left in the care of Mr. and Mrs. Putnam in a desolate swamp country, reaches the age when she is to be prepared for the world, and the Putnams send word to Judge Gates, her guardian, to come for her. Her life has been spent in the swamps with a half-witted boy, "Weird Willie," and many animals and birds of that country, as her only playmates. Judge Gates receives the letter at his bachelor apartment, which he shares with a younger friend and companion, Bob Stange. Through the accidental dropping of a marriage license the Judge discovers that Bob is about to become a benedict, despite the fact that they had a compact never to marry, on the theory that all women are deceitful.

Heavyweight boxing champion Jack Dempsey stars in this 15 chapter action serial, of which portions of reels 1, 2, and 4 survive. In the serial he plays the star fullback of his college's football team who gets drawn into an adventure when he stops to rescue a young woman from some thugs on a country road. It includes a gag featuring an exploding football. The rest of the cast includes Lon Chaney, Edgar Kennedy, Bull Montana, Josie Sedgwick and Herschel Mayall.

Pampered Frederic "Freddy" Pritchard, warned by his father that he must work or be disinherited, learns how to crack safes to help his girlfriend Gloria Nevins, whose villainous uncle holds security for the family jewels, as well as the right to vote on the disposition of the Nevins Motor Works. After Freddy steals the papers with the aid of his valet Smithson, Gloria's uncle locks him in a warehouse to prevent him from attending a crucial stockholders' meeting. Freddy escapes and saves the factory for Mrs. Nevins, who gives him power of proxy. Pritchard, Sr., pleased with his son, consents to Freddy's marriage to Gloria.

A Canadian Mountie is assigned to bring in his brother, who was framed for the murder of a gold mine owner. Based on Robert W. Service's poem "Clancy of the Mounted Police."

Sylvia, a model in the shop of a fashionable dressmaker, is introduced to the Hicks family, which recently has acquired a fortune through iron ore deposits discovered on their farm. Octavia Hicks sees in the cultured but unpretentious Sylvia a good match for her son Henry and invites the young woman to visit the Hicks home. Two other visitors, Frank Hayward and his accomplice Annie, are masquerading as a count and a princess in order to con the country-born millionaires out of their money. The two are introduced to Sylvia, who soon discovers their plots and exposes them. A mysterious foreign gentleman appears and announces that the fashion model is actually the Princess Sylvia of Karalyn, but she renounces her title to marry Henry.

A mad doctor sews human head onto gorilla's body.

Two Boy Scouts win an around-the-world trip with a crack aviator, and find themselves crash-landed in the South American jungles after the ace forgets to refuel in Ecuador.

A wealthy man's wife becomes bored with him, so his friend decides to trick her into an elopement into the unforgiving wilderness to make her appreciate her life anew.

Mystery and adventure, surrounding a stolen rubber harvest.

A promising young prizefighter sees his career start to go down the drain after he gets married and allows his wife's father and no-good brother to move in with them.

A small-town, jazz-mad girl, Peggy Marston (Dorothy Revier), becomes involved with a pair of society thieves, Maurice Dumond (Armand Kalis) and Maxine (Mildred Harris), and finds herself falsely accused of possession of stolen jewels.

Wealthy playboy Sandy Benton falls for pretty but decidedly less wealthy neighbor Doris Lawrence. She rebuffs his attentions, but scheming golddigger Estelle has her own plans for Sandy. When Doris hears about Sandy's wild times with Estelle, she sets out to show him that she, too, can be a "modern" woman.

The first film adaptation of Sir Arthur Conan Doyle's classic novel about a land where prehistoric creatures still roam.

Bob Carter, a member of the Foreign Legion, is glad to see his brother, Don, for the first time in ten years but is sorry that Don has joined the Legion. Bob, Don and Bob's buddies, Muggsy and Bilgey, go to a café and there Don falls for Nina, a singer in love with Bob. Bob doesn't know this and thinks she is Garccia's girl, and warns Don to have nothing to do with her. Don disregards the warning and Garcia discovers Nina and Don together and provokes Don into hitting him. Don is arrested and thrown into the company brig. Nina, with the aid of an Arabian sheik, Ul Ahmed, helps Don escape. Bob, Muggsy and Bilgey follow but are captured and taken to Ul Hamid's headquarters. The sheik tortures Don to force Bob to work some captured machine guns for him. Ah Hamid and his tribe attack the fort, but Bob manages to turn the machine guns against his captors, and the fort is saved.

Madame Adele, once a great star of the Paris theatre, has fallen upon hard times. But she allows a young American performer, Marie Duval, to perform as the Madame Adele of old, and both become the darlings of Paris, one again and the other newly-crowned.