A few yeas ago I saw the Monkees being interviewed. They're all old now. The interview went well, except for Peter Tork. When it was his turn to talk, he babbled incoherently–alternatively between sentence fragments and run-on sentences. Some things he even shouted out, like leftist slogans. It was clear he didn't have all of his marbles anymore. The others guys covered for him and kept the mic away from him.
I don't know why I had the recollection just no.