Elizabeth and Joyce are in the coroner’s van with Sue. They are heading to the morgue in Godalming with Martin’s body. Elizabeth privately reprimands herself for overcomplicating the case. She realizes that Douglas and Poppy have been dead all along and that Sue killed them. She has asked Joyce to record everything on her phone secretly.

Elizabeth confronts Sue, saying she knows she killed Douglas and Poppy for the diamonds. She adds that Sue slipped Siobhan’s phone number into Joyce’s pocket. Sue does not deny the accusations. She reveals that Siobhan has just messaged her to say the diamonds have been found in Joyce’s microwave. Pointing a gun at Joyce, Sue asks for her postcode and redirects the driver to Coopers Chase.

As they drive, Elizabeth presents her theory of events to Sue. She suggests that Poppy found Douglas’s letter and handed it to her boss, unaware that Sue was Douglas’s lover and the couple had plotted to sell the diamonds. When she read the letter, Sue realized that Douglas still loved Elizabeth and was planning to betray her. Wanting Douglas dead, Sue informed Martin that Douglas was at Coopers Chase. Martin sent Andrew to kill Douglas, but Poppy prevented him.