I think this is a masterpiece. The narrative is beautifully complex, creating a rich and unique world with engaging and believable characters. The messages imbued thought this story are interesting and thought-provoking. The final twist is so unexpected but makes so much sense and will likely keep my mind working for some time to come. The acting, particularly Paul McGann's but also the rest of the casts', is so strong and powerful, while the sound design and score fits in effortlessly.

I cannot recommend this more highly. The only thing I would note is that you need to give this audio pretty much your full attention at all times in order to follow it fully. Other than that, I would recommend everyone to jump into it right now. You don't even really need any context. The Doctor is travelling with Charlie, a human, and C'rezz, an alien, through another universe and they're not in controll of where they travel to. That's all you need.