Edited sentence: ") In the transmission prints, there is no consistency as to when the cut to replace these graphics with the clip of Rover occurs.(This is an acronym for "Protect Other People" which is referred to in the episode "Once Upon a Time," and also in the show's occasional use of the song "Pop Goes the Weasel., the complete bicycle maintains its visual presence during the closing strains of the theme, instead of being replaced by either the cosmic animation or the live-action footage of the balloon.In a couple of episodes, the last piece of the bicycle has yet to appear, and in another, its entire framework has faded away from the wheels.In the originally planned version of the closing credits, seen in the alternative version of "The Chimes of Big Ben," Rover is not shown.Instead, the image of the bicycle frame fades out to leave only the wheels.The camera then zooms in towards the Earth which explodes into the word "POP".The final episode, "Fall Out," presents a further variation, i.The wheels then begin to spin faster and faster transforming into the Earth (little wheel) and the Universe (big wheel)