 In 1842 England , a young boy builds a <unk> , but refuses to play with the other children . The <unk> starts speaking to the boy , repeating his <unk> that the other children are silly . Fifty years later , the boy has grown up to be Dr. Walter <unk> , proprietor of the Great Intelligence Institute . He hires men to collect samples of snow , which he places in a large snow @-@ filled globe in his laboratory before feeding the men to a group of animated <unk> . The Doctor , still <unk> after losing his former companions Amy Pond and Rory Williams , has parked his <unk> above Victorian London among the clouds . He uses his allies <unk> , Jenny , and <unk> to keep people away from him . They also fill their time investigating mysteries throughout the city . 
