Starts on a junkyard planet - "the Totter's Lane at the end of the universe."
Actor Michael Sheen
is a "glorious guest villain."
Actress Suranne Jones
: "Somebody who may turn out to be an old acquaintance of the Doctor's with a new face."
Plays with 47 years of Doctor Who
mythology - takes "stuff" from The War Games
and "an old William Hartnell episode I remembered."
Includes scenes where Matt is "vulnerable, disturbed and upset".
Gaiman gives a script example:
AMY: I told you to keep an eye on The Doctor.
RORY: He'll be fine, he's a Time Lord.
AMY: It's just what they're called. It doesn't actually mean they know what they're doing.