Helene Marshall

Pat Keogh is a bank robber and killer who, when the episode begins, has just killed a man and Cheyenne has been accused by a group of vigilantes.

Annie comes to the rescue of an eastern banker being taken in by a scrupulous gambler trying to take advantage of his naivety.

Two outlaws rob a stage, kill the driver and leave the shotgun guard for dead. The guard survives the attack and, with the help of a passerby, manages to make it to Diablo.

A Dutch gunsmith, the inventor of an new rifle with superior range, plans to give the weapon to the United States Army in gratitude for being allowed to immigrate. A crooked businessman decides to take advantage of the man's patriotism and sends an impostor posing as an officer to take possession of the gun before the real colonel can arrive in Diablo.

While visiting the port town of Vista, Texas, Doctor Baxter comes across one of histories most fatal plagues.