David Susskind was the man.
Only nine episodes on Hulu but I found all the ones I watched pretty interesting, particularly Jerry Lewis.
This one with Mary Tyler Moore in the first segment was interesting because a psychic was brought on while she was still on stage and MTM was obviously uncomfortable with the whole thing. But it was fun to watch almost everything the psychic said (mostly about the upcoming 1966 presidential election) was completely wrong (unless I've forgotten about Mitt Romney's dad getting the Republican nomination and Robert Kennedy being president).
And looking at Wikipedia I see it was only in his first few years that he was able to go as long as he wanted, then they started syndicating.