There can’t be many programmes that bring to mind quotations from both Henry Kissinger and Boney M., but BBC2’s The Countess and the Russian Billionaire was one of them. While Kissinger’s idea that ‘power is the ultimate aphrodisiac’ may be a little out of fashion in the #MeToo age, it was hard not to think it played a part in the eye-popping events that Wednesday’s documentary laid out with some relish.