Our second outing of Season 10 opens in media res, or at least feels like it and I’ll admit I rewound the live TV just in case I’d blinked and missed a few vital seconds. I hadn’t. After a brief and pointed reminder from Nardole regarding the Doctor’s ‘Oath’ to protect whatever’s in that vault, we’re off on the customary companion’s first trip episode. In the distant future, at the edge of the…