If you wish to take part upload your video of you dancing like the cast to youtube and send the link via email to firstname.lastname@example.org
You have till November 13th to submit your addition.
Pass the word on.
EDIT: Include a flag of your country in the video.
That’s why they still have human things like sandwiches and shovels. The Doctor had been trying to fix another dimension-colliding sort of thing so he could save the universe and wound up making another one when he did so- including a version of himself that exists without having to avoid the no-crossing-time-streams rule.