

He’s still active in MI5, and he’s accompanied by his handler, Penny, who is young and inexperienced. Elizabeth shows up at the proposed and finds her ex-husband Douglas, there. In Part I, Elizabeth is revealed to be a former MI5 (British intelligence) agent, and she receives a letter from a “Marcus Carmichael”, a fictional person whose death she once faked as part of her work for MI5, asking to meet.

(This book picks up very soon after the previous novel ends with the same main characters - Elizabeth, Joyce, Ritchie and Ibrahim - at the Coopers Chase retirement community.) She then kept working with Elizabeth to try to uncover the location of the diamonds. It’s eventually revealed that he stole them with help from Sue, his contact at MI5 who he was romantically involved with. The one-paragraph version: the Thursday Murder Club gets involved in a new case as Elizabeth’s ex-husband, Douglas (a MI5 agent), shows up asking for help since he stole 20M in diamonds and is in hiding.
