Ashley Jensen and Alison O’Donnell reprise their roles as Detectives Ruth Calder and Alison ‘Tosh’ McIntosh. 

The BBC have announced the return of Shetland, which begins its latest run on Wednesday 6th November.

The crime drama’s ninth series continues the story of the new lead detective DI Ruth Calder (Ashley Jensen). She took over from Douglas Henshall’s Jimmy Perez.

Here’s what to expect from Shetland series 9:

A double missing person’s case blurs the lines between the personal and the professional, as Calder and Tosh are drawn into a labyrinthine investigation. When Tosh’s friend, Annie Bett, goes missing she suspects something is seriously wrong. Ruth Calder – now living in Shetland – has no time to recover from a life-threatening ordeal of her own, as together they set out in search of Annie and her young son, Noah. They discover accountant Annie is estranged from her husband, Ian, and has been staying with mussel farmer John Harris and his two sons, Patrick and Fergus. Worryingly, there’s no sign of Annie there either.

Calder follows Tosh’s instincts and looks for Annie at the home she shared with Ian. There, they discover Professor Euan Rossi who claims to have been Annie’s Oxford University tutor many years ago. Suspicions are stirred when Tosh and Calder learn Rossi travelled all the way to Shetland after Annie left him a distressed voicemail the night she vanished. Calder can’t shake the feeling there’s more to Rossi than meets the eye.

Meanwhile, at the station, Calder delves deeper into another case involving a deadly argument between two brothers. The missing persons investigation draws Tosh and Calder into a web of lies and when a bloodied person turns up at a remote garage, nothing can prepare the team for what lies ahead.

The series 9 cast

The show is once again led by Ashley Jensen as Calder, with Alison O’Donnell as Tosh. They’re joined by Sarah MacGillivray, Jacob Ferguson, Robert Jack, Vincent Regan, Ross Anderson, Macleod Stephen and Ian Hart.

The series also stars Steven Robertson, Lewis Howden, Anne Kidd, Angus Miller, Steven Miller, Leeroy Boone and, Coor McCarry. Plus, Eubha Akilade, Stuart Campbell, Nalini Chetty, Richard Thomson, Tibu Fortes, Andrew John Tait, Tara Lee, Jimmy Yuill, Lesley Hart and Gemma McElhinney.

Shetland is a Silverprint Pictures production for BBC.

You can find the previous eight runs of the show on the BBC iPlayer.