Mandrake wrote:As far as I can remember it wasn't in any previous episode
Harry Guinness wrote:It was the special where the earth got moved across the universe. It was last xmas's maybe, or else the end of the season before.
Of course, I could be wrong...

Last Christmas was the one where the 'other' Doctor had the hot air balloon and a real screwdriver and I don't think it was in that, the year before was set on the spaceship Titanic with Kylie in a rather fetching waitress costume... perhaps it was in the end of the last series where shedloads of peeps were piloting the Tardis home.... No good, must delve into the DVDs!