Conversation so far:
What was the controversy in the smothers borthers comedy hour show about?
The brothers soon found themselves in regular conflict with CBS's network censors
Why was there conflict with the censors and the smothers borthers?
the network ordered that the Smothers deliver their shows finished and ready to air ten days before airdate so that the censors could edit the shows as necessary.
Are there any other interesting aspects about the smothers brothers article?
Despite the conflict, the show was picked up for the 1969-70 season on March 14. However, network CEO and President William S. Paley abruptly canceled the show
When was the smothers brothers comedy hour  show cancelled by CEO and President William S. Paley?
on April 4, 1969
Was the smothers brothers coemdy hour show popular despite the controversy?
The series was a major success, especially considering it was scheduled against the major NBC television series Bonanza
Did the smothers brothers do anything to try to get the show not to be cancelled?
This cancellation led the smothers brothers to file a breach of contract suit against the network
Why did the smothers brothers continue to defy the CBS censors?
Did the about controversy censoring the Smothers brothers show ruin the smothers brothers career?
Despite this cancellation, the show went on to win the Emmy Award that year for best writing. The Smothers Brothers starred in several other television shows.

Question: What one thing that they did more controversial that was the final straw for the CBS censors?
Self-contained rewrite: What one thing that the smothers brothers  did more controversial that was the final straw for the CBS censors?