Day 511: City of Death Part 2

Hopefully, the above clip should start at around 1:20. It runs for about 4 minutes, and is probably the single funniest scene ever to be produced in Doctor Who. Each line of dialogue is superbly witty, and is helped supremely by the performances of the actors. Baker chooses to play the Fool, wandering around and being a little bit silly throughout, choosing for the character of the Doctor to have some fun in this situation. The others play things relatively straight, allowing for the humour of the situation to be magnified.

But the scene also plays an important role in the plot as well. It shows the Doctor meeting the villains, and reveals that he is actually quite keen to be captured by them such that he can learn more of their plot. Adams makes this worth watching by adding banter, which also has the benefit of us growing to enjoy the company of the characters more and more. This sort of thing is a common thread throughout the story, such as in a scene towards the end of this episode, wherein the Doctor and co. are found by the villainous Count Scarlioni, which features an absolutely beautiful pun about throwing light onto the situation. It's all just another reason to adore City of Death.