For this weeks Doctor Who favorite quote contest I had to pick a quote from the episode "A Town Called Mercy". Here is the comment I left.
Isaac: Everyone who isn't an American, drop your gun.
This is my favorite line in the episode "A Town Called Mercy" because it was said by a good actor. It was a funny line. It fits well in the stories of the 11th Doctor.
Here's the trailer for the episode from BBC.