Conversation so far:
What did Johnny Carson do in early radio?
Johnny Carson began his broadcasting career in 1950 at WOW radio and television in Omaha
Did Johnny Carson have a huge audience?
Johnny Carson's show Who Do You Trust? became the hottest item on daytime television during his six years at ABC.
Are there any other interesting aspects about the Johnny Carson article?
In 1955, Jack Benny invited Johnny Carson to appear on one of his programs. Benny predicted that Carson would have a successful career as a comedian
Which shows did Johnny Carson host?
Johnny Carson hosted several shows besides Carson's Cellar, including the game show Earn Your Vacation and the CBS variety show The Johnny Carson Show
Who did Johnny Carson work with on Who Do You Trust?
Johnny Carson worked with sidekick and straight man, Ed McMahon on Who Do You Trust.

Question: what did they do together?
Self-contained rewrite: What did Johnny Carson and Ed McMahon do together?