Episode 3 of this playful and perverse new series – TV’s most twisted take on a serial murderer since Dexter – starts with the latest target of hit woman Villanelle (Jodie Comer) indulging in some kinky fun during a business trip checking himself into a “medical facility” staffed by a dominatrix. Unfortunately for him, the establishment’s usual purveyor of pain and pleasure has been replaced for the day – with Villanelle, wearing a black wig and flashing the smile of a professional killer who enjoys her work perhaps a bit too much. And for this week’s Killing Eve, that’s just the opening scene…