BBC and other outlets report that actress Alison O’Donnell is leaving the long-running BBC crime drama Shetland after 13 years in the role of detective Tosh, also referred to as DS Alison “Tosh” McIntosh. O’Donnell, described as an original and long-standing cast member, has confirmed her departure and says she wants to pursue other acting opportunities. Coverage notes that she has played the character since the series began in 2013, making her one of the show’s best-known performers. Reports frame the exit as a major cast change for the programme, with several outlets also highlighting fan reaction, including disappointment at her departure. While the reporting broadly focuses on O’Donnell’s decision to step away and the length of her tenure, it does not include detailed information about the timing of her final episode or the specific on-screen storyline that will accompany her exit. The announcement is consistent across sources: O’Donnell is leaving Shetland after 13 years as Tosh to explore “new adventures” and other roles.