The Beast Must Die
originally aired on AMC
The Beast Must Die is a British thriller television series based on the novel of the same name by Nicholas Blake. It centres on a mother's grief for her son who was killed in a car accident. The series premiered in the United Kingdom on BritBox on 27 May, 2021, and ran for one series of 5 episodes. A second series was in development, titled A Sword In My Bones.
Frances Cairnes wants to hunt down and kill the person she believes is responsible for her son's death. When she believes she has tracked him down, she tricks her way into his house and plots his murder. Meantime, the new police inspector in the area has found out that his predecessor didn't do a thorough job with the original investigation.