Everyone who's got a working knowledge of Dr. Who knows that the Daleks are a horrifying threat to all other life. Still, they're beaten again and again because the Doctor can find ways to upset their plans somehow, and once the plan goes, it all goes.
Then this bizarre thought hit me: what if there were no plan? What if a Dalek host was taken over by, say, tanar'ri. All of that dakka and shield technology, in the claws of a creature that does not plan to destroy all life and structures, but just gets up and does it.
The image popped into my head of a Dalek's 'eye' suddenly flaring red, and I could just hear that horrible voice laughing insanely while the thing powered up, took off, and started blasting everything in sight. More and more Daleks get taken over and it turns into a huge brawl with absolutely everything that gets in their way - including unpossessed Daleks. They wouldn't need a plan, they wouldn't hesitate, they wouldn't fear the Doctor (they've been fighting immortals forever and a day, what's one more?), and it would be fiendishly difficult (pun duly intended) to predict what they were going to blow up next because they probably wouldn't even know themselves. Add in fiendish spell-like abilities, and you have a huge problem on your hands.
Thoughts? Criticisms? Suggestions...?

