i have got to tell you this one, you know those knock, knock jokes? >> yeah, but they're old now. >> i have got a real good one, a real funny one, go ahead, start, say it. >> knock, knock. >> who is there? >> there was only three networks, there was only one late night show, really, jack parr -- >> they don't understand what -- how we do this show. we just keep talking with no script. >> i know. it's agony! >> jack parr 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 fastbally -- fabulously, interesting, complex, frightening, neurotic, but in other cases, enthusiastic, informed personality. it made for great television.