' ▁role ▁in ▁late ▁ 2 0 0 8 ▁was ▁split ▁between ▁writing ▁the ▁ 2 0 0 9 ▁spe ci als ▁and ▁prepar ing ▁for ▁the ▁transition ▁between ▁his ▁and ▁M off at ' s ▁production ▁team ; ▁one ▁chapter ▁of ▁The ▁W riter ' s ▁T ale : ▁The ▁Final ▁Chapter ▁discuss es ▁plans ▁between ▁him , ▁Gard ner , ▁and ▁T enn ant ▁to ▁announ ce ▁T enn ant ' s ▁departure ▁live ▁during ▁I TV ' s ▁National ▁Television ▁Awards ▁in ▁October ▁ 2 0 0 8 . ▁His ▁final ▁full ▁script ▁for ▁Doctor ▁Who ▁was ▁finished ▁in ▁the ▁early ▁morning ▁of ▁ 4 ▁March ▁ 2 0 0 9 , ▁and ▁film ing ▁of ▁the ▁episode ▁closed ▁on ▁ 2 0 ▁May ▁ 2 0 0 9 . ▁Russell ▁T ▁Dav ies ▁co - w rote ▁" Plan et ▁of ▁the ▁Dead " ▁with ▁G are th ▁Roberts , ▁the ▁first ▁writing ▁partners hip ▁for ▁the ▁show ▁since ▁its ▁ 2 0 0 5 ▁rev ival . ▁Dav ies ▁also ▁co - w rote ▁the ▁next ▁episode , ▁" The ▁W aters ▁of ▁Mars ", ▁with ▁Phil ▁Ford . ▁ ▁Writing ▁in ▁his ▁regular ▁column ▁in ▁Doctor ▁Who ▁Magazine ▁ 4 1 6 , ▁Dav ies ▁revealed ▁that ▁the ▁original ▁title ▁for ▁" Part ▁One " ▁of ▁" The ▁End ▁of ▁Time " ▁was ▁" The ▁Final ▁Days ▁of ▁Planet ▁Earth ", ▁while ▁" Part ▁Two " ▁was ▁always ▁referred ▁to ▁as ▁" The ▁End ▁of ▁Time ".