LBT And Doctor Who
Yeeep, I've said it before and I'll say it again.
The Rainbow Faces return, turning out to be the Doctor and a "new" companion. They've been gone for some time, but have returned to help save the Valley-and the world- from a group of terrible creatures called the Daleks. But nobody believes them.
(Part of this is inspired by the fact that there were some Daleks in the Time War that got blasted into the time of the Dinosaurs and were "exterminated" very, very quickly)