 " The Stolen Earth " and " Journey 's End " are the culmination of all four series of Doctor Who since its revival in 2005 and show runner Russell T Davies ' work in reviving the show . Davies stated the story arc for the fourth series comprised " an element from every episode — whether it 's a person , a phrase , a question , a planet , or a mystery [ that ] builds up to the grand finale " , and the finale " [ had ] been seeded for a long time , with small but vital references going all the way back to Series One " . Several of these thematic motifs are used as major plot points : the significance of disappearance of bees , the Medusa Cascade , and the Shadow Proclamation are explained in the episode . It is the first major crossover between Doctor Who and its spin @-@ off series Torchwood and The Sarah Jane Adventures . Davies compared the crossover 's conception to a typical child 's imagination of a crossover between the Doctor Who and Star Wars universes : 
