What's your favorite Doctor Who episode?

My fav TV show, very good question ^w^ I don't know what is my most favorite episode are because I love a lot of the episodes in Doctor who but I have three really favorite episodes that are on top of my head and they are -The water of Mars-, -42- and -Silence in the Library-. thankyou for your question ^^

1. My fav color is green & orange ^^
2. I like to use ABU brand diapers
3. Star wars lego's or Halo Mega bloks sets! I love building with lego's ^^
4. Yus I do! ^^It is my most favorite game right next to Halo.
5. Heeeeyyy I get 0 too >...< I clean dwy foxy
6. I like to RP both as adult & kid Matty but I like Rp'ing as 4 year old kid matty I will say ^^
7. Because I was away from FA for awhile and was busy :P
8. Matty obviously >:P
9. I think I would be dead from toxic air before I could do a change! XD

Then I would faint from the smell XD

Nuuuu >..<