Mary Newton

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.

When a number of women are murdered, under the same circumstances, in a small Arizona town. Travis & Rynning are sent to investigate.

University researcher Nina Whitehead drops dead after being injected with the new "wonder tranquilizer" she's been working on. The syringe was filled with curare and research student Brian Clark is charged with her murder.