A student rebels against schoolwork and sets off to sea with only Hobo as his crew.
An elderly prospector (Keenan Wynn) rejects all offers of aid---he's determined to die alone in the desert. He is found by Hobo who helps him.
A meek middle-aged bank teller masquerades as Don Juan to rob his own bank. Unless Hobo can prevent a bank robbery.
A medical student tries to strike it rich in the North Woods.
A publicity-seeking young singer tries to convince police someone attempted to kill her with claims she was the near victim of a strangler - only to become involved with the real thing.
An ex-fighter prevents a holdup in an ice cream parlor.
A fugitive needs London's help.
A Cuban refugee tries to protect his cross-eyed brother from teasing.
London and two detectives attempt to prevent a holdup.
London plays mascot to a race horse.
A pilot tries to save a child who was bitten by a rabid dog.
When London wanders into a Chinese restaurant, the owner of the restaurant, Wu Chang, considers him an omen of good fortune.
London and a friend try to help the Edgemar Girls Home win two Percheron horses at an auction sale.
The only witness to a fatal hit-and-run accident: London, the hobo dog.
Can London help a rodeo rider who has lost his nerve?
London's new friends: two female parachute teachers. Their students: a pair of bank robbers.
A dog has been trained to attack a politician.
A crippled child is taken as hostage by gunmen during an armored car robbery.
A shy store owner gets some help from Hobo in showing up the Sheriff, his rival for a woman, during a manhunt in the woods for a felon.
London must stop a man from killing his business partner.
A wealthy woman incurs her family's wrath when she names London her sole heir.
Hobo protects a young mother-to-be on her way to join her soldier husband.
A young boy tries to prove that his land isn't haunted.
London protects a girl from a purse snatcher---and gets involved in a fur-stealing scheme.
Anita accidentally witnesses a murder.
A trader kidnaps a deaf-mute Indian boy and his cougar-hunting dog.
Eloise Tanksley defies her family and names London her heir.
An unemployed ventriloquist (Edgar Bergen with his famed trio of dummies) helps London to escape the dog catcher and London in turn helps get him permanent employment.
Hobo helps find a missing baby.
A lumberjack leads a strike---and the strike leads him into a crooked logging contract.