The casual viewer might be forgiven for assuming that he's ingested the wrong substances and is hallucinating a Doctor Who/Big Brother crossover, but no -- the Doctor really has landed in the Big Brother house. Of the 2002nd century. He's as confused about it as the casual viewer. Rose, meanwhile, has ended up in a futuristic Doctor Who/The Weakest Link crossover; and Jack Harkness in a Doctor Who/What Not to Wear crossover staffed by naked robots (whom Jack flirts with). The casual viewer may be forgiven for thinking that this is all rather strange... Again.