Accidental spy Tim (Darren Boyd), still hoping to rekindle office romance with Caitlin (Rebekah Staton), has the perfect assignment fall in his lap: shielding an at-risk, incredibly hot witness (Anna Skellern) in his home. Making his colleague jealous by pretending would be enough, but Elaine proves willing and, indeed, insatiable.

She's also dangerously barking, culminating in a confidently over-the-top scene in a restaurant that could be cringeworthy if the cast weren't so good. It climaxes with a line that caused major corpsing on set. You'll know it when they get there.

Tim's best mate, ex-wife and boss all observe his new relationship, in an episode that makes good use of that visual gag where you don't initially know certain characters are present in a scene. Chief lurker is monstrously irresponsible therapist Owen, played with manic relish by Miles Jupp, the latest addition to a fearsomely good ensemble.