Zog (planet)

"Zog" was a colloquialism Donna Noble once employed to indicate to the Tenth Doctor that she was referring to "a hypothetical planet". (DW: The Unicorn and the Wasp)

Behind the scenes
Zog (Planète)
 * The colloquialism likely derives from Zig and Zag, puppets famous in the British Isles, who were said to come from the planet Zog.
 * In The End of Time, Jack visits an unnamed bar in an unnamed city on an unnamed planet. Though the episode as televised leaves the audience clueless as to the identity of these places, the script and online commentary were more forthcoming.  Between these two out-of-universe sources, writer Russell T Davies specified the planet as "Zog" the bar as the "Zaggit Zagoo bar" and the city as "Zaggit Zagoo".