Short answers, pulled from the story.
The Ed Sullivan Show ran on CBS from the 20th of June, 1948, to the 28th of March, 1971. It aired every Sunday night from 8 to 9 p.m. Eastern Time for most of its run, occupying the same weekly slot on the same network for more than two decades.
Elvis Presley's first appearance on The Ed Sullivan Show on the 9th of September, 1956, was watched by a record 60.71 million people, representing an 82.6 percent share of the television audience. That percentage share remains the largest in the history of American television.
The Beatles' first live appearance on The Ed Sullivan Show on the 9th of February, 1964, drew an estimated 73 million viewers, a record for U.S. television at the time. The broadcast was broken three years later by the series finale of The Fugitive.
The Doors were banned after Jim Morrison sang the original lyric "girl, we couldn't get much higher" in "Light My Fire" during a September 1967 live broadcast, despite agreeing backstage to change the line at the request of network executives who believed it referenced drug use. Ed Sullivan refused to shake the band's hands afterward and they were never invited back.
SOFA Entertainment, formed by television documentary producer Andrew Solt in 1990, purchased the exclusive rights to the complete library from Sullivan's daughter Elizabeth and her husband Bob Precht. The collection consists of 1,087 hours of kinescopes and videotapes broadcast by CBS from 1948 to 1971.
CBS cancelled The Ed Sullivan Show on the 16th of March, 1971, as part of a mass cancellation of advertiser-averse programming. The show's audience had grown older, and sponsors found the median viewer age unattractive; younger viewers were actively moving away from the program by the late 1960s.