Groucho Marx “honors” Johnny Carson at his Friars’ Club roast, broadcast on The Kraft Music Hall program on October 23, 1968. Six years prior (October 1, 1962), Marx introduced Carson on his very first Tonight Show.

Others there to “honor” the talk show king were Don Rickles, New York’s then-mayor John Lindsay, Ed Sullivan, Steve Allen, Dick Cavett and host Alan King.
 

 
Carson was roasted yet again in 1973 on The Dean Martin Comedy Hour. The guest list is a truly staggering line-up of showbiz royalty, Martin’s drinking buddies, people on long-forgotten TV shows and utter anomalies like Senator Barry Goldwater and Truman Capote. Even if you just watch the opening credits, trust me, it’s worth it...