dr who revelation of the daleks dvd

yesterday my mum get me the revelation of the daleks DVD from tesco it was only £8 bargain

but one thing that i found out when reading the back of the DVD is the Graeme Harper directed it he still directs today wow hes been doing it for so long now even though Dr who hasnt been on it since then because its been of air

the doctor and Peri arrive on the planet necros home of tranquil a funeral home for the Galaxy's elite but is this the own final resting place?and why do daleks guard the inner sanctum's of the perpetually interred? perhaps the grate healer will have the answers....