Bonanza
Following Canary's departure, Frizzell's character accompanied Jamie Hunter to the Ponderosa and became the Cartwright's foreman.Initially, "Bonanza" aired on Saturday evenings opposite "Dick Clark's Saturday Night Beech-Nut Show" and "John Gunther's High Road" on ABC, and "Perry Mason" on CBS. "Bonanza"s initial ratings were respectable, often coming in behind Mason but ahead of the ABC line-up. Ironically, executives considered canceling the show before its premiere because of its high cost. NBC kept it because "Bonanza" was one of the first series to be filmed and broadcast in color, including scenes of picturesque Lake Tahoe, Nevada, although most of the episodes were obviously filmed on soundstages until the seasons near the end of the series. NBC's corporate parent, Radio Corporation of America (RCA), used the show to spur sales of RCA-manufactured color television sets (RCA was also the primary sponsor of the series during its first two seasons).
Bonanza
Attempts to replace Adam with Little Joe's maternal half-brother Clay (Barry Coe) and Cartwright cousin Will (Guy "Zorro" Williams), were unsuccessful. Creator David Dortort introduced a storyline that would keep the character of Adam in the mix, but with a lighter schedule. During season five Adam falls for a widow with a young daughter, while making Will Cartwright a central figure. Roberts decided to stay an additional season, so the scripts were quickly revised by having Adam's fiancée and her daughter depart the series prematurely with Guy Williams' Will, with whom she'd fallen in love. It was Landon, not Roberts, who objected to the infusion of any new Cartwrights. After Roberts did leave the following year, it was eventually mentioned that Adam had gone "to sea", and in the later movies he had emigrated to Australia and had a son Adam 'A.C.' Cartwright, Jr. In mid 1972, the series producers considered inviting Roberts back in the wake of Dan Blocker's death: "One suggestion was to return Pernell Roberts, who had played another Cartwright son when "Bonanza" first premiered on NBC fourteen years ago. We only considered that briefly, [producer Richard Collins says] Some people felt it was a logical step—the oldest son returning at a time of family need—but most of us didn't think it would work.'