The Tenth Doctor in School Reunion

[The Doc]

The Tenth Doctor was the tenth incarnation of the renegade Time Lord known as the Doctor. Unlike his immediate predecessor, who was plagued by melancholy due to his actions during the Last Great Time War, this incarnation was much more outgoing and genial, a demeanour that hid the "survivor's guilt" that had plagued him since the war. Over his life, however, the weight became much more pronounced. He was haunted by companions lost, enemies believed long-dead and events that threatened the fabric of time itself. He met his end after he absorbed a huge quantity of nuclear radiation whilst saving the life of his friend, Wilfred Mott, leading to his regeneration into his next incarnation.

[Peri-Peri]

I think David played this really well. You could tell that even when acting, the fan in him was geeking out at being with Sarah Jane and I think that familiarity from his youth really added to the believability that they know each other from way back. The scenes with them both were great.

[Exterminate]

I liked him in this but this is where his relationship with Rose started to cross a line that I wasn't comfortable with. His scenes with SJS though were great and I agree with everything PP said above.

[Saber]

I think David played this really well. You could tell that even when acting, the fan in him was geeking out at being with Sarah Jane and I think that familiarity from his youth really added to the believability that they know each other from way back. The scenes with them both were great.

Exactly this.

[Roranicus]

He did a good job of balancing all the characters around him without being overshadowed by them. His scenes with Sarah Jane were excellent.