i've got to tell you this one. you know those knock, knock jokes? >> yeah, but they're old now. >> i've got a real good one, i've got a real funny one. >> go ahead. >> start. say it. >> i say? >> yeah. knock, knock. who's there? >> there was only three networks. there was only one late night show, really, and it was jack paar. >> they don't understand how we do this show. we just keep talking with no script. >> i know. it's agony. >> jack paar invented the late night television talk show. >> you feel confident? >> there is not a man in the world to beat me. i'm as pretty as liberace. >> jack had in his corner his personality. his fabulously interesting, complex, frightening, neurotic, but in other cases enthusiastic