In "Star Trek: Discovery", Kenneth Mitchell portrayed the Klingons Kol, Kol-Sha, and Tenavik. However, the most personal role within the successful series was that of Aurelio, a character who sits in a wheelchair due to his illness. This role was specifically developed for Mitchell, as the actor had been dependent on a wheelchair since 2019. In 2020, the Canadian actor made his ALS diagnosis public. Kenneth Mitchell leaves behind his wife, actress Susan May Pratt (50), and their two children aged 17 and 12. Pratt wrote on Instagram on Sunday: "My dear husband Ken has left us." The actor is due to be buried in the coming days, surrounded by his family.