Advent Calendar, Day Twenty Four

It's Christmas Eve!!! Only 1 day to go before Xmas and The End of Time. There will be a "jumbo" pack of stuff on the advent calendar for tomorrow, but for now, I have piled up on some cool Doctor Who facts.

• Including both The End of Time episodes, David Tennant will have done 47 Doctor Who episode (excluding animation, spin off, and short specials).
• In The Impossible Planet, the sound effects for the doors were used in the games DOOM and DOOM 2.
• The working title for Doomsday was "Torchwood Falls".
• The Christmas Invasion was the first ever Doctor Who Christmas Special.
• Swansea's Singleton Hospital was used to film the scenes in the Royal Hope Hospital in Smith and Jones.
• 42 is the shortest episode title in Doctor Who's televised history. Also, it was in "real time", so the whole story was only about 42 minutes, making it the shortest story.
• Utopia was the first story to show more than 2 names in the title sequence.
• Some early reports suggested that the title for Partners in Crime was actually Partners in Time.
• In The Poison Sky, when the Doctor cuts off transmission with the Sontarans, a clip from CBeebies cartoon Tommy Zoom was on.
• The Girl in Silence in the Library was watching Pedro and Frankensheep.
• In Turn Left, Donna gets a free psychic reading because she has red hair. In Chinese culture, red is considered lucky.