My favorite episode of Doctor Who is probably Turn Left. How one tiny little thing can change the world, whether you decided to turn right or turn left. And in telling the story, a time-travel type story (but not exactly), they manage to integrate the rest of the Doctor Who universe. As the others stand up to fill the void, they save the day, but leave our world with one less hero, until there are none left.
At the end, she whispers two words into Donna’s ear, a message for the Doctor. It never crossed my mind what the two words might be, until The Doctor asked and then it hit me(!), I knew without a doubt what the two words were and then Donna said them and DW fandom went wild! It’s funny, I don’t know if Rose ever said those two words to this Doctor…?
Why I didn’t want to pick that one is because you just can’t go and watch it if you aren’t a big follower of Doctor Who because it references so many things it just isn’t relevant to a non-fan. Turn Left is a very non-Doctor episode, what’s funny is my second favorite episode is Midnight, which is a very non-Donna episode, takes place right before this episode, but could be watched on it’s own, Midnight is David Mamet meets sci-fi.
Other favorite episodes that stand on their own:
- Rose – The first episode of the 2005 reboot.
- 2005 Christmas Special – The transition between Doctor’s nine and ten; plus a real Torchwood reference and Harriet Jones.
- Smith and Jones – The first episode with Martha. This was the first season I ever watched in order.
- The Shakespeare Code – Martha, The Doctor and Will Shakespeare.
- Blink – Spooky! A non-Doctor and non-Martha episode.
- Vincent and the Doctor – Amy, The Doctor and Vincent Van Gogh (and an alien)
The Doctor: (Asking Jack about his raygun) Sonic blaster… 51st Century… Weapon factories at Villengard? 
