Shetland season 9 episode 2 uncovers dark secrets behind murder victim Annie Bett

In Shetland season 9 episode 2, DI Ruth Calder and her colleague Tosh investigate the murder of Annie Bett, who was found dead in an old house. The episode reveals Annie was a local math genius with a hidden past, including a possible connection to organized crime. As the investigation unfolds, Tosh learns that Annie's husband, Ian, is missing but later found drunk and covered in blood. He initially denies knowing Anton Bergen, another murder victim, but incriminating texts suggest a troubled relationship with Annie. The episode concludes with Calder discovering that Annie and a professor, Rossi, were involved in espionage, hinting that this secret may have led to her death. The investigation deepens as connections between the victims and their hidden lives come to light.