In the premiere of Down Cemetery Road , a desperate woman walks into a private investigator’s office. “Let me guess,” says the detective, Zoë Boehm ( Emma Thompson ). “You’ve got a husband. He’s got a secretary. Am I warm?” She is not. Neither a film noir femme fatale nor a jealous housewife, Sarah Trafford ( Ruth Wilson ) has come to Oxford Investigations for help in solving a mystery that has little to do with her own life. Her initially inexplicable obsession sets the tone for Apple TV’s unusually humane conspiracy thriller, which premieres on Oct. 29.

An art conservator who'd prefer to be immersed in detail work, Sarah is bombing as the host of a dinner party where her entrepreneur husband (Tom Riley) hopes to impress an obnoxious prospective investor (Tom Goodman-Hill) when a

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