Edited sentence: After dinner one evening on the trail, Rawls delivers a powerful yet vulnerable rendition of "Swing Low Sweet Chariot".Another equally powerful performance addressing the larger and timely (late 1960s) issues of race and prejudice are keyed by guest star Lou Rawls playing a drifting cowboy.Even more impressive displays of these qualities, and the best examples of Breck's fine work on the series, occurred when highly respected actors made guest appearances.Hired by Nick, Rawls impressively displays superior rodeo ability and the two quickly strike up a deep friendship.His compassion and understanding of his friend's plight and the racial inequality faced by Mexicans in a land originally their own, display the full depth of Breck's mastery of the role.However, for all his bluster and whitehot temper, Breck's portrayal was not without nuance.Martin Landau portrayed a rancher of Mexican descent who grew up on the Barkley ranch, roughly the same age as Nick.Nick quite often displayed an undying, palpable loyalty and tenderness to his siblings and mother.Nick's low-key but comprehending response to Rawls fully illuminates Breck's underappreciated subtlety as Nick.Nick's vivid childhood recollections, though not all pleasant, give us the deepest insight into the character's foundations.Now grown and driving his own herd (Anthrax stricken) to market, he stops to graze and water his cattle, and to reminisce with the Barkley family.This ABC hit series, like his earlier series, Black Saddle, was produced by Dick Powell's Four Star Television.Two in particular stand out