The two things on my mind throughout the episode: Are they going to explain how after disappearing from 1941 and being stranded in AD 200100 he reappeared in the 21st century? And, why does the guy playing Harper look so familar?
IMDB helped with the second question and Harper's got a Sci-Fi connection, once removed: He was in "Bleak House" on Masterpiece Theater, which costarred Gillian Anderson, who was the reason that I watched it. (For the uninitiated, that's Dickens, not sci-fi.)
Doctor Who now heads into its 3 part season finale. Doctor and Martha are reunited with Captain Jack and journey to the year 5 Trillion. For the first 35 minutes of the episode, Captain Jack and the Doctor catch up with old times with Martha feeling left out as the two men chatter about missing Rose. For much of the episode, it is a boring remake of “School Reunion”. However the last 10 minutes is pure excitement. You may want to record the episode. At the end of the episode, you will say, “Wow! I can’t wait for next week.” I give “Utopia” a grade of A.