Rose

Yes. Two, even: the "antiplastic" (what?) and Rose's sudden hidden gymnastic skills. But I'll let them off. It's the first episode, after all, and the real story is Rose meeting the Doctor, not the Doctor beating up the evil plastic thing. That's just a backdrop. The Doctor pops up out of nowhere to save Rose a couple of times during the course of the episode, but I can forgive that too. Never again, mind.