Colditz is a lot of fun and has a lot of interesting facets to it. David Tennant as Kurtz is memorable and he really conveys this sense of being an unhinged lunatic. It's hard to not to hear the Tenth Doctor in his performance but I think it's just because we're so familiar with him as a performer, because I think if anything he elevates the role past the more limited secondary villain content that was in the script. Ace is outstanding in this story, showing her uniqueness as a companion by being a consistent cog in the gear of the Third Reich. Sophie Aldred is so good here. The setting is well done and feels like, in spite of being a dark period, it is done justice.

I only have a couple of critiques. First, though a lot of people seem to like Klein, I found her a bit off-putting. I didn't quite enjoy her performance and found her storyline interesting but the execution ever so slightly lacking - not quite living up to her potential. Still, it was enough to leave me curious about the future of her character and I look forward to hearing those audios, too. And the Seventh Doctor, while a delight, was a little hard to understand around the music and effects. I had trouble hearing him a few times and even a couple other characters which kind of stinks because otherwise Colditz is fantastic, full of great ideas, and absolutely worth any Who fan's time. The effects and music are good too, they just can't ever get in the way of the dialogue during a listening experience.