Not receiving top billing during season 1, although appearing in the majority of the episodes, were Linda Gray as J.R.'s long-suffering, alcoholic wife Sue Ellen; Steve Kanaly as ranch hand Ray Krebbs, Pam's ex, who would eventually turn out to be Jock's illegitimate son; and Ken Kercheval as Pam's brother Cliff Barnes, J.R.'s archrival. Gray and Kanaly were promoted to the regular cast as of the first episode of season 2 and Kercheval as of the first episode of season 3. David Wayne received guest star billing as Willard "Digger" Barnes.