Guest star Richard Kiley is cast as Sheriff Gideon Yates, one of Nevada's most admired lawmen. When Joe Cartwright comes to Yates claiming that he has witnessed a murder, the Sheriff realizes to his horror that the killer was his own wife Lydia (Terry Moore). With grim determination, Yates quietly decides that Joe must be silenced for keeps, leading to one of the most thrilling showdown sequences in Bonanza history. Written by Ken Pettus, "Gideon, the Good" was first shown on October 18, 1970. ~ Hal Erickson, Rovi