Poirot makes the acquaintance of a mysterious man who invites him to a dinner party-only for his host to wind up dead during a bridge game.
William fears things with Mary are ruined, but she's preoccupied with a truant teenager and her meddling mother, Molly, who's got "fix up" plans of her own.
Nikki and Jack are under pressure when a teenager's remains halt an eco-housing project.
Whilst Nikki and Jack close the net on Brian Blackburn's troubled son, Leo finally finds someone willing to confirm his fear.
