Insurance Agent Ted Sanders has been called in to investigate a robbery and murder. A deputy also arrives to investigate. But unknown to Ted, the Deputy is a fake and actually part of the gang. The fake plants some of the money in Ted's room so he can arrest him. Then with the help of the gang he plans to finish Ted off.
Rex, a wild stallion, and Rinty, a police dog, are pals. Their master , John Sheldon, is framed for murder, and Alice Ingram plans to race Rex for money to pay for John's legal defense. Meantime, Frank Nolan, who has falsely accused John, sets out to steal Rex for himself.
A 12 episode serial starring Rex, the King of the Wild Horses and Rin-Tin-Tin, Jr. Rex is brought from the island of Sujan, where he is worshiped as a God-Horse, to the U.S. to be trained as a polo pony. He escapes, meets Rinty and with the help of Frank Bradley is returned to Sujan. The natives have been persuaded to turn against their God-Horse, however he is rescued just in time before he is burned as a sacrifice.
Funds are embezzled and a fur trapper is murdered. Rin Tin Tin to the rescue!
An unhappy child, accompanied by his dog, runs away from home and is befriended by a gangster on the lam.
A fire in the mountains drives a wolf pack into the nearby desert where they terrorize the local residents. The leader of the wolf pack is Lobo, actually a halfbreed (Rin Tin Tin). When the pack is discovered hunting a herd of cows, a posse gives chase. Lobo leaves his pack to lead the posse away. He is injured and found by a local prospector, Dave Weston (Charles Farrell). The prospector nurses Lobo back to health and the two become close friends. Meanwhile, Weston has made a Borax find in the area. His girlfriend May Barstowe (June Marlowe), daughter of a wealthy rancher, is pleased. However, the local chemist, Borax Horton (Pat Hartigan), actually a claim jumper, plans to steal the claim.
A World War II European orphan, Paul, has lost all faith in humanity. Brought to the United States by Father Mathew, Paul's confidence and faith are gradually restored through his close association with a dog, Rin-Tin-Tin.
A lighthouse keeper and his daughter are in trouble on two fronts--if the authorities find out he is going blind they will remove him, and a gang of liquor-smugglers is trying to destroy the lighthouse so they can land their illegal cargo on shore without being spotted.
Paul Andrews returns from the World War with Buddy, a dog he found in Europe. Instead of getting a warm welcome, he finds his sweetheart, Caroline Blair, missing.
Ben Darby and Pancake, his father, are owners of a mining claim in Northwest Canada. Ben goes to war, leaving Pancake to run the mine. During Ben's absence three claim jumpers take possession of the mine: one of the men is the father of Beatrice, Ben's sweetheart; another, a rival suitor. Pancake is murdered when he and Ben plot to regain the claim. Ben kidnaps Beatrice, resolving to obtain revenge through her. Ben finds that she knew nothing of the stolen claim and that her father was innocent of Pancake's murder. Ben then resolves to find the culprit and bring them to justice.
Bill Holmes rescues Rinty from a car wreck not realizing that there is a stolen $50,000 diamond necklace hidden in the dog's collar.
Rinty is a police-dog assigned to a young Scotland Yard police-officer who covers the Limehouse district of London.
Rinty rescues heroine June and hero Pat from all manner of desert dangers, both natural and man-made. The film's high point of tension finds the canine star rescuing Nye from a deep pit.
A German Shepherd puppy is "adopted" by a wolf pack in the snowy and frozen Great North and raised by them as one of their own. A few years later he comes upon a fur trapper and saves the man from certain death, and begins to feel a kinship with him that is stronger than the one he has with his adopted pack.
A girl engaged to a member of the Royal Mounted Police is forced to marry a vicious blackmailer after he gains incriminating evidence on her father.
On the Border is a 1930 movie set on the Mexico-California border, where a border patrolman and his loyal German Shepherd work together to thwart a gang leader's smuggling operation. The movie showcases the challenges faced by the patrolman, including deception, human smuggling, and gunfire. Along the way, they encounter a damsel in distress, a hacienda, and various dangerous situations. Rin Tin Tin, the famous German Shepherd from the silent era, plays a key role in the film, demonstrating his heroism and intelligence.
A giant condor decimates a herd of sheep, and Rin-Tin-Tin is accused of having turned killer.
A prospector is murdered by The Cactus Kid and his gang, who hope to find the murdered man's goldmine. The miner's dog, Rin-Tin-Tin, recognizes the killers, who thereafter seek to use the dog to locate the lost mine. With the help of a government agent and a young girl, Rinty saves the mine and brings the bad guys to justice.
During World War I, Rin-Tin-Tin finds that he must rescue his master, a fighter pilot, from his wrecked aircraft. He also has to help him escape his rival, who has ordered him shot so he can have the girl they're competing for all to himself.
The story of a boy, a dog, and a man. The boy discovers he is heir to a shipping line, and travels to Los Angeles, accompanied by inventor/radio operator Bob Whitlock and Irene Blaine. Their journey is aided by Pal, a wolf dog.