It was the final season of the "classic" series. Unusually for a Doctor Who season, aside from some scenes in Survival, all the stories took place on Earth. Apart from Battlefield, the stories followed a loose character arc, as Ace came to terms with her past. As for the Doctor, he had become darker in personality, treating others as pawns in the battle between good and evil while dressing in dark clothes to match his personality change. This was the first and so far only season to be produced entirely out of broadcast order.