I've noticed that on Muppets Tonight, there'll often be similar scenes or gags that occur in Clifford's introductions two episodes in a row, even if they weren't produced back-to-back.
Like the first two episodes, they both begin with Clifford's introduction being interrupted by one or more of the Extremes, I think both introductions also have him saying, basically, "Welcome to Muppets Tonight, the show that'll make television look a little like this..." before being interrupted.
And there's two in a row that begin with Clifford saying, "Welcome to Muppets Tonight, the show that has people all over the world saying...", and then a cut to somebody watching the show on TV and saying something unflattering. In one, Statler and Waldorf say, "where's the remote?", and in the next, a family says "I don't get it", only for their dog to understand and try to explain it to them.
And there's two in a row that begin with Clifford having brief chats with the band.
I can't remember all the episodes that have these, I know they were all in the first season, but I remember them airing back-to-back, and the production order is different from the broadcast order (maybe they added these intros to the episodes after the broadcast schedule was decided on?).