A lovely Idea for a Minisode, with some great Acting Moments for Piper, her Reaction to the Doctor changing is easily the Highlight in this Story. On the other hand, it's nice to see Tennant so early on, trying to figure out how he wants to play the Part.

As its own Thing, it's fairly solid, honestly, but Part of me wonders if I liked this part much more if it was in 'The Christmas Invasion'.

Solid stuff really.

Somehow never seen this before. Interesting to see 10th's immaturity and mania teasing through even in his first moments. Right off the bat, he doesn't want to stare directly at the weight of what's just happened. Despite 9th's growth, he's still not ready to face big scary things like his own role in ending the the Last Great Time War.

Interesting to see his first moments, in which he acts like regeneration is no big deal, when we know that his last moments will involve not wanting to go.

It was a strange choice to explain and ease regeneration into a new audience in a sketch not part of the main show - while the sketch works well to ensure that the audience not familiar with regeneration are introduced to the process, it would have been more natural to introduce us to this new Doctor especially in the story. This is particularly relevant considering his full debut has the Doctor asleep for the majority.

A fun little short though, laying out a good groundwork for the new Doctor.

Enjoyable bridge between The Parting of Ways and The Christmas Invasion.