Buddy Roosevelt, a notorious bandit known as the "Phantom," and his doppelgänger, drifter Jeff McCloud. Bull manages to throw suspicion on Jeff but is himself killed by Jim Breed (John Junior).

Sheriff Jack Norton is badly wounded in a gun battle with bandits and is helped by Anita Parsons, the daughter, as he later learns, of the bandit leader. Torn between his love for the girl and his devotion to duty, Jack decides the latter is too strong to resist.

Lightnin' tries to save agent Eileen Sedgwick and her rich boyfriend from the infamous webs of the Spider.

The plucky boy rider Red discovers the dead body of Jim Crawford in the desert. A message scratched on a canteen begs the finder to protect Jim's daughter Ann from the killer, Luke Matthews.

A young woman and her father search for hidden treasure in the African jungle.

Ranger the German Shepherd dog races to the rescue when Jim is framed on a murder charge.

Jim West, foreman of John Calhoun's ranch, falls in love with Helen, the boss's daughter, after rescuing her from a runaway horse. Her brother, Ted, falls into the companionship of Bill Jackson, a notorious gambler and saloon keeper, who persuades Ted to sign I. O. U.'s while under the influence of alcohol. Jim, in company with Red Irwin, a tough deputy sheriff, confronts the gambler and forces a confession. Jackson plans a raid on the Calhoun cattle, forcing Ted to be his ally. Dolores, a dancehall girl, overhears the plot and tells Jim, causing Helen to misunderstand his motives.

Lightnin' the dog and his master, Tom Harding are on to a group of smugglers who operate down at the harbor. Tom nearly bags them, but he's overwhelmed and they take flight. His girlfriend bluffs her way into the gang's hideout, but is discovered and held back. Tom is again overpowered by the crooks and thrown in a secret dungeon, but he fights his way out.

Like many Easterners who suffer from consumption, "The White Plague," Jim Warren goes to Arizona for the curative powers of its dry climate. When he arrives in Tucson, though, he cannot find a room because he is a 'lunger.' Ill and despondent, Jim is befriended by Betty Blake, the daughter of rancher and town sheriff Frank Blake, who suggests that he try the open desert. Wandering the desert, Jim happens upon members of the gang headed by Scar-face Jordon, a notorious rustler.

The story of a decent, law-abiding saloon owner who gets himself in trouble with the corrupt city fathers when he attempts to close down the town's watering holes at midnight and on Sundays.