Up through the run of "Highway to Heaven", all of Landon's television programs were broadcast on NBC, a relationship of which lasted thirty consecutive years with the network. After the cancellation of "Highway" and due to a fallout with those within NBC's upper management, he moved to CBS and in 1991 starred in a two-hour pilot called "Us". "Us" was meant to be another series for Landon but, with his diagnosis on April 5 of pancreatic cancer, the show never aired beyond the pilot.