After His Retirement
When Johnny Carson retired in 1992, he was followed by late night talk show host Jay Leno. It is widely believed that Carson was not happy with this choice, and he would have preferred that David Letterman succeed him instead. He went on to appear on Letterman’s show twice, but never on Leno’s.
Post Late Night Work
After leaving Late Night, Carson mostly stayed out of the limelight. However, he made some cameo appearances, most notably on The Simpsons in 1993, on which he voiced himself. His last television appearance was on The Late Show With David Letterman.