Another amazing YouTube find: The night of May 6, 1971, Johnny Carson's guest host on The Tonight Show was Woody Allen, whose guests included Bob Hope and James Coco. Someone has uploaded pieces of this broadcast and the little player I've embedded below will play them, though not necessarily in the right order.
There are many points of interest in here. One is that you get to see the way Mr. Carson's show opened for a few years there with some odd graphics. Another is that you see Ed McMahon taking, as he often did with guest hosts, a more activist role in keeping the proceedings moving along. The mutual respect between Mr. Allen and Mr. Hope is obvious, especially the way Woody looks at Bob. And I suppose I'll find other things to enjoy when I have time to watch it again. Here's your chance to watch it now…