The conclusion of Peter Harness's two-parter was even better than the setup; perhaps because there were less 'UNIT soldiering' action scenes and more of The Doctor (Peter Capaldi) just being wonderful. Capaldi was on marvellous form throughout, with Osgood (Ingrid Oliver) making for a brilliant stand-in companion—good enough to make me wish Osgood might become a permanent resident of the TARDIS in Series 10. Alas, it seems this won't come to pass. Jenna Coleman also continued to have a blast as Clara's evil Zygon clone, Bonnie (or 'Zygella' as The Doctor nicknamed her).
And while I began last week's review mulling over the effectiveness of Capaldi's incarnation of this character, it's only fair to say that scene and his performance went some way to elevating his ranking as The Doctor. I still think he needs a bonafide classic episode or two under his belt, but there's no denying this speech was a spine-tingling joy.
Overall, "The Zygon Inversion" was an excellent episode and easily the best of Series 9 so far. Peter Harness has done a lot to dispel the split-reaction to his "Kill the Moon" last year, to become one of the Who writers I'm most interested to see return. Even if this hour was ultimately a bit knockabout, only really having to ensure Capaldi's shining moment was arrived at with enough buildup and excitement... I don't really care. That scene, that dialogue, that performance... it's something Doctor Who clip shows will now be sourcing footage from forever.
- Osgood's first name was revealed: Petronella. Do we believe The Doctor's name is Basil, as she claims?
- Loved the callback to Kate's father with her echoing his famous "five rounds, rapid" line, first used in "The Daemons". Did you know there was a character in that episode called Sgt. Osgood, too? Any relation?