Plot Synopsis

Based on the novel of the same name by Nicholas Blake (pen name of Poet Laureate Cecil Day-Lewis CBE), THE BEAST MUST DIE is a six-episode revenge thriller that tells the story of a grieving mother, Frances Cairnes, who infiltrates the life of the man she believes killed her son in a hit-and-run car accident on the Isle of Wight. After learning the police investigation into the fatal hit and run of her young son Martie has been dropped, Frances Cairnes takes matters into her own hands. Posing as a novelist researching a new murder-mystery, Frances ingratiates herself with the family of George Rattery, the man she suspects is responsible, and sets a plan in action to kill him. She's tracked by detective Nigel Strangeways, who has reason to believe his department covered up George's involvement in the incident. Suffering from PTSD following the recent death of his partner, Strangeways throws himself into pursuing justice for Martie. But when he discovers an "undercover" Frances living with George and his family, Strangeways finds himself working to both prove George's guilt and head off Frances's plans for revenge before anyone else dies.

THE BEAST MUST DIE will premiere on Monday, July 5, 2021 on AMC+ and on Monday, July 12 at 10pm ET/PT on AMC. In the series opener, Frances begins her search for the person who killed her 6-year-old son in a hit and run; DI Strangeways arrives on the Isle of Wight, hoping for a fresh start after the death of his colleague.

The remaining episodes continue to debut on AMC+ on Mondays, one week ahead of their AMC linear airings at 10pm ET/PT.