What can you tell me about the Tonight Show with Jimmy Fallon? 
Well, I know that it comes on really late at night and the show was originally hosted by Johnny Carson. I don't know much other than that! Do you watch the show?
Yeah sometimes. The Tonight Show with Johnny Carson played from 1962 to 1992. 
Who took over after Johnny Carson? I think there was someone before Jimmy Fallon?
The Tonight Show
The Tonight Show is an American late-night talk show currently broadcast from the NBC Studios in Rockefeller Center in New York City, the show's original location (a tradition interrupted by decades of emanating from various studios in the Los Angeles region) and airing on NBC since 1954. The series has been hosted by six comedians: Steve Allen, Jack Paar, Johnny Carson, Jay Leno, Conan O'Brien, and Jimmy Fallon, and had several recurring guest hosts including Ernie Kovacs during the Steve Allen era
"The Tonight Show Starring Johnny Carson", "Late Night with Jimmy Fallon" and "The Tonight Show Starring Jimmy Fallon". Its theme song was an instrumental version of "Everything's Coming Up Roses", and the closing theme was "So Until I See You" by Al Lerner.
History.
In July 1957, after the failure of "Tonight! America After Dark" (a news-oriented program first hosted by Jack Lescoulie and briefly by Al Collins), NBC reverted its late-