"Knight of the Silver Star" marks the advent of Walt Slade, a Ranger who works almost exclusively undercover and whose reputation is suspect by most lawmen who regard him as an outlaw. In "Terror Stalks the Border," Texas Ranger Jim Hatfield finds himself pitted against a vicious criminal organization that, in addition to robberies, has left in its wake several brutal victims of murder who were tortured first. This organization is led by a mysterious figure known only as The Rider. No one has ever seen his face.