Conversation so far:
When did Johnny Carson move?
After the primetime The Johnny Carson Show failed, Johnny Carson moved to New York City.
Why did Johnny Carson move to New York City?
Johnny Carson moved to New York City to host ABC-TV's Who Do You Trust?
Did Johnny Carson leave family when he moved to New York City?
Are there any other interesting aspects about Johnny Carson besides moving to New York City to host ABC-TV's Who Do You Trust? ?
Although Johnny Carson continued to have doubts about his new job, Carson became the host of Tonight.
Did Johnny Carson have any other pull with the Tonight Show?
Did Johnny Carson stay in burbank
Did Johnny Carson work any other jobs, besides as a TV host?
Johnny Carson refused many offers to appear in films.

Question: Why did he refuse?
Self-contained rewrite: Why did Johnny Carson refuse to appear in films?