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Phil Ford, the story's writer, has said he set it in the period immediately prior to "The End of Time", which would therefore also place it as happening in the general time-frame as he Tenth Doctor's involvement in "The Day of the Doctor", and the various other companionless Tenth Doctor Adventures (such as "Prisoner of the Daleks" (BBC New Series Adventures novel)), during the period when he was procrastinating on returning to the Oodsphere to face his death after being summoned there in "The Waters of Mars".