A Suspicion Of Sudden Death - S1.E12

Rupert, Amy and Rupert's agent Christopher attend the funeral of one of Christopher's other authors, Will Carpenter, before going back to the author's house where his brother and sister are hosting the wake. Rupert sees one of Will's books on the shelf, looks at it then can't fit it back on the shelf so puts it on the shelf below. Later, he asks Will's brother if he can have one of Will's books as a keepsake, naming the one he'd been looking at earlier. Despite having claimed he didn't know his brother's house very well, Will's brother goes straight to the shelf where the book had been and is surprised to find it not there. After Rupert and Amy drive away, she discovers she's forgotten her gloves so Rupert goes back only to find Will's brother and sister enjoying a sing-song. Rupert is sure something isn't right so he and Amy decide to investigate.