Ogron (The Universe Marathon)
From Tardis Wiki, the free Doctor Who reference
Error creating thumbnail: Read-only mode
During the "universe marathon" during which the first six incarnations of the Doctor raced each other from Gallifrey to the end of the universe, the Doctor lost valuable time explaining the theory of relativity to an Ogron, which obviously took some doing, much like teaching K9 to "sit". (NOTVALID: The Universe Marathon)