Arterton power-walks stylishly through Tom Bradby’s slick crime caper that takes itself so seriously even the saucy stuff is solemn. Slow Horses this is not Arterton power-walks stylishly through Tom Bradby’s slick crime caper that takes itself so seriously even the saucy stuff is solemn. Slow Horses this is not A nother week, another glossy espionage drama in which agitated politicos scour the corridors of power in search of something, anything, to differentiate the thing from its predecessors.