Doctor Who: "Cold War"

Well, that was a Gatiss script.

( Mutually assured spoilerification! )

21 first lines

...only I often find my first lines don't stand all that well on their own, so I'm being self-indulgent and doing first ... bits.  Lines, paragraphs, whatevs.  Includes completed stories, early drafts that were sufficiently different to get a separate file, etc.  Going by the date the GoogleDoc was last changed.

( Here is a cut tag! )