I have a partial copy of Big Bird's Storytime, and I recall fondly the musical scene in the library where Oscar encounters two fat blue anything muppets: one dressed as a like a navy captain named Gilbert, and the other dressed in a brown top-hat and suit named Sullivan; Oscar says to them "not you two guys again, you two always tell me too much about everything!" Obviously, Oscar has encountered these two guys before, but this is the ONLY time I've seen them; when and where else have they been seen (and bothered Oscar)?