Hobo stalks an ominous carnival patron.

Hobo investigates the disappearance of zoo animals. Carol Lynley.

A con man tries to cheat wealthy small-town residents.

Hobo protects a photographer who snapped a shot of a bank robbery and decides to sell his picture to the papers. James Stephens.

Hobo and an insurance investigator help recover a missing truckload of diamonds.

Hobo reunites a runaway boy with a family who wants to adopt him.

A teen is dropped from a basketball club for arson.

Hobo contracts botulism trying to save two children.

London hears the screams of a girl named Peggy, who says that she is running from a giant ape loose in a forest. In the neighboring small town of Red Hill, rumors are already spreading about "Bigfoot" being in the vicinity.

In a forest, London encounters three wolf-hunters: a crotchety man and his two sons, one intent about the hunt, the other squeamish. The Hobo decoys hunters away from a wounded wolf and her cubs.

Hobo discovers a man and his mute daughter are being blackmailed into performing fraudulent séances for bereaved victims.

London finds a wallet dropped by a man leaving a park, picks up the wallet, follows the man to the man's home, and gives the wallet to the man.

Hobo helps a bungling investigator.

A wealthy woman announces that she's leaving her money to her dog.

Two brothers compete in a bike race to try to earn money for their mother's birthday.

A seismologist takes his family along on a field assignment, where they are threatened by impending earthquakes of which only the Hobo appears to be fully aware.

The quakes continue to imperil the now separated members of the family and an armed poacher who prefers his privacy only adds to the danger.

The biggest quake of them all strikes and causes a cave-in, trapping Marti with the poacher.

A boy with a leg injury has his heart set on buying a pure-bred dog, but needs to raise the money fast, so the Hobo helps him with a dog-sitting service. This episode was written by Charles Eisenmann, the owner and trainer of London and the other German Shepherds who portrayed Hobo.

The Hobo must escape from a dog catcher's van and round up several unruly dogs which quickly bring havoc to wherever they roam. This episode was written by Charles Eisenmann, the owner and trainer of London and the other German Shepherds who portrayed Hobo.

A criminal steals a secret laser.

A bookie tries to fix a lumberjack competition using extreme methods.

Hobo is mistaken for a sheep-killing wolf.

A hero firefighter dodges a medical order relieving him of duty, endangering his own life.

The sick firefighter continues to put himself in harms way, while Hobo tries to call attention to the problem.

Hobo joins the Farrells on a luxury yachting expedition, which enters a storm and shipwrecks the crew on an uninhabited island.

The elusive stranger turns out to be a Soviet air force pilot who has been stranded on the island for some time.