It's a bit odd that the segment where Mr. Johnson wanted something to read on an airplane wasn't shown, considering this seasons focus on literacy. But it seems like Mr. Johnson has been making a comeback in the last few years. I don't think any new material with him was shown between 2002 and 2005, and the only old material shown with him was the Elmo's World: Food segment. But then he returned for A Celebration of Me, Grover! made a cameo in a season 36 episode, appeared in two new sketches (and I think one repeat) in season 37, and this season we get at least one repeated sketch, a cameo in a street story, and a new sketch (though I think it's a remake of an older sketch).