The big end of series finale begins with this, as the two main themes of the overall arc come together.

The Doctor and Ruby return to the present day, to UNIT. They've been seeing the same woman throughout thier travels, each time as someone different and its time time to find out who she is. Also on the agenda is the mystery of Ruby's mum and why it snows when she thinks of her.

We're into more (new series) traditional Doctor Who here. Along with Kate Stewart, is Mel and Donna's daughter Rose, its like the gangs back together and we're on secure ground. The 'woman' is known to UNIT, as Susan Triad and the idea is floated that it could be the Doctors granddaughter. The suspense is there, after all this time are we going to get a reunion?

Suddenly switching between finding out about Susan Triad and investigating Ruby's mum and back seems a little odd, wouldn't you just deal with one issue at a time? But again this plot thread began with the Christmas episode, Ruby abandoned as a baby, the snow and why there's no trace of a relative. We're invested in what the outcome is, and on the edge of our seats in wanting the answers.

With Ruby's mum, grandmother and Mrs Flood all making appearences it quite packed. Kate mentioning her father telling stories of the Doctor - it has some nice moments.Though parts of this story feels a bit been there done that, Army of Ghosts springs to mind. The Doctor and Rose coming back from their travels to catch up on what they've missed, Torchwood with all the latest tech etc.

An emotional outburst by the Doctor, seems a bit out of place and as with the crying, out of character.

The reveal at the end wasn't expected by me and was a great surprise, but the cliffhanger was slightly drawn out.

On the whole pretty good.