I agree Jimmy wasn't well. I also agree he stole the show. For me he is the show. I want to add on a much happier note, again not revleant to Michael Palin, everyone needs to see Roy Harper's new interview with Uncut and the wonderful things he says about Jimmy. This is about half it:
"Jimmy's a gentleman, a first-rate gentleman. I'll stand by him for the rest of time. There maybe sides to him that's he's never shown to me, that he's kept hidden from me. But I doubt it and if he does have a dark side, I was never part of it. The heavy atmosphere that surrounded Zeppelin at times had everything to do with Peter Grant. He was something to behold, a very powerful man. He was a brilliant businessman as well as an ogre who had a reputation for breaking people's fingers for just looking at him in the wrong way. He was someone you did not want to cross in any circumstance. You went to parties and there were two people who never ended up in the swimming pool, who you would never, ever, think of throwing in the pool - Jimmy and Peter. Oh, and the woman who was carrying for the band and had something or other in her bra."