From Chipo Chung to Derek Jacobi, all involved give brilliant performances here. The enthused scientist chatter between the Doctor and the Professor is a breath of fresh air, and the sci-fi/metaphysical chatter between the Doctor and Jack is refreshing as well.
Looking back at this episode with the benefit of the intervening years to place it, I would say that it represents a zenith of sorts for the show. Great script, excellent execution, etc.. Some great moments followed, "Waters of Mars" for example, but the tight execution and dynamic cast on display here are brilliant. Freema Agyeman is great, as well as the supporting cast and especially John Simm.
Looking back at this episode with the benefit of the intervening years to place it, I would say that it represents a zenith of sorts for the show. Great script, excellent execution, etc.. Some great moments followed, "Waters of Mars" for example, but the tight execution and dynamic cast on display here are brilliant. Freema Agyeman is great, as well as the supporting cast and especially John Simm.