A woman and her weakling brother inherit a mine. When the brother commits suicide the guide is accused of murder.

A fugitive, dangerous madman reaches an English village where he confronts his former partner who left him for dead in the jungle after their discovery of a diamond mine. When the former partner also claims to have since lost the mine and all its wealth, which he took all for himself, and though the partner is still living in a state of luxury , the madman takes up an offer from a crazed scientist to make him invisible, something the scientist has already done with experimental animals, so that he can take revenge.

Aliens from Outer Space are slowly switching places with real humans -- one of the first being a young man about to get married. Slowly, his new wife realizes something is wrong, and her suspicions are confirmed when her husband's odd behaviour begins to show up in other townspeople.

Dooley and his K-9 partner Jerry Lee are ready to retire from the police force. But before he can retire with his pension he must work as a P.I. to find a set of high tech computer chips.

Rin-Tin-Tin is saved from the beatings of a trapper by Ed Nolan, a shiftless trapper himself, and 'Rinty" follows Nolan home to his cabin but refuses to enter. Nolan takes him to the home of Mary Mallory, the girl he has failed to win as his wife because of his ways, and in their mutual love of 'Rinty," a new understanding is born and Nolan goes to work.

Rinty is a police-dog assigned to a young Scotland Yard police-officer who covers the Limehouse district of London.

Adapted from Dorothy Yost's story, "The Untamed Heart"

Our doggy hero is abandoned in the desert while in pup-hood. Upon reaching maturity, Tin Tin has undeservedly earned the reputation as a killer canine. Thus, the human characters spend most of their time hunting down the dog in hopes of collecting a huge bounty.

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 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.

A giant condor decimates a herd of sheep, and Rin-Tin-Tin is accused of having turned killer.

LAPD detective Mike Dooley and his dog, the German Shepherd Jerry Lee, have been successfully partnered for ten years, but Jerry’s advancing age has Dooley’s superiors suggesting retirement and they are forced to work with a younger K-9 team: female cop Sergeant Welles and her disciplined Doberman Zeus.