Doctor Who: Ravenous 2

Having reunited his companions, the Doctor decides to lift their spirits by treating each of them to a trip to their home world. On Kaldor Liv is confronted by a face from her past, and on Earth Helen must summon all her skill and knowledge to help save her friends from eternal damnation. But try as they might to stay out of danger, dark forces are emerging. Dark enough to strike fear into the hearts of a Time Lord.