The Doctor appears on the screen. He's in a dirty blue suit, and surrounded on all sides by rubble and debris. The screen ripples with heavy radiation.
"Hello there," he says, grinning broadly. "This is a message for the people who have captured the citizens of Taxon. Well, when I say 'citizens', we're really just a bunch of prisoners, aren't we? But this message is for the ones holding us all here."
He holds up a small, cobbled-together device. "This is a molecular ray demorphiciation replication unit. Basically, it's a short-range time-hopper. Doesn't hop very far into the future, so I've set it to exactly one hour after this broadcast has been made. As you can see---"
He gestures behind himself. "Not exactly the most pleasant place here. This is Taxon, after I've destroyed it." He pauses. "There are three thousand, two hundred and fifty eight bombs littered all across Taxon. Feel free to check your records, I've acquired enough materials from your replication units to make them. And when I press down on this---" he holds up a small detonation device, "---they'll all go off, one at a time. Unless you meet with me and discuss the complete evacuation of everyone within this city. Including the people called the 'Extras'."
He takes a breath and looks, for a split second, unsure. He relaxes. "So everyone gets out, or everyone dies and your precious city is destroyed with them. You have one hour."
OOC: Blowing up stuff plot get! Everyone who wanted to be part of this, feel free to have your characters head off to the places the bombs/sentinels are set up! The sentinels look
like this and shoot non-lethal rubber pellets and knockout darts.