this was such a brilliant start to season 9. the Daleks return was fun but not even the most intriguing part of the serial, the most intriguing part has to be the idea of trying to change your history and instead causing your history. Jo feels a lot more refreshed in this serial -she feels more active and engaged overall making her feel a lot more of a companion to the doctor. the crew have three Daleks and mirror props, and by Davros they will get the use out of them.