The last 6 episodes of Series 6 attract a lot of maligning for...well, not all that sure, really. This last run of episodes is every bit as audacious, thought-provoking and heartfelt as Doctor Who has ever been. Matt Smith is a complete wonder throughout all of them, wielding total authority and massive screen presence that threatens to eclipse all else - these episodes in particular provide some of his greatest moments, as his Doctor slowly grinds down towards a seemingly inevitable tragedy and in the process re-evaluates certain aspects of his existence (no spoilers!).
The lightning-fast tongue-in-cheek Let's Kill Hitler places him in a challenging face-off between an amoral hellraiser he knows is innocent, and righteous upholders of justice he knows are mistaken. Night Terrors sees him dip into some more of his age-old wisdom to aid a paranoid parent and his even more paranoid son (I found the denouement a tad schmaltzy but nice all the same). The unforgettable The Girl Who Waited finds time to put the Doctor beneath the microscope with gut-wrenching intensity, even in an episode seemingly dedicated to the Ponds' everlasting bond.
The God Complex is a cruel, dramatic and intelligent tale of faith and fear with a truly stirring surprise conclusion, boasting some impressive experimental direction. Closing Time offers a welcome more light-hearted but still valid perspective on (and overdue counterpoint to) the Doctor's worsening ethical conflicts. And that finale...in 45 minutes we're bombarded with striking setpiece after striking setpiece, all infused with Matt Smith's brilliance, and tied into a surprisingly straightforward [for Moffat] story that brings the Doctor at last to his wits' end with the tragic truth of River Song - and his own burgeoning secrets.
The twisting mystery elements and Hollywood sheen of Part One might be absent, but the sheer strength of the Eleventh Doctor and his character journey lets these episodes shine. (And getting them in HD was totally worth it. My eyes were glued to the screen.)